The "Hitchhiker's Guide" to the Maxi-Stream mod

[ToTaLCHaoS13]

I need help! I made two mjmod's using mj900's and the low-flow kits from mjmods.com. This morning I came downstairs to the sound of one of them trying to spin backwards and slamming into the acrylic stop peg. It never was able to get itself spinning correctly so I unplugged it several times and still no luck. Left it unplugged and went to work. Then when I got home from work the other was doing the same thing! :mad2:

I'm sure it is something I have done wrong but I have no idea what. I followed the direction perfectly...everything is balanced and when it is spinning the right direction it produces a ton of flow...

Has anyone else had this problem?! :confused:

[ToTaLCHaoS13]

I need help! I made two mjmod's using mj900's and the low-flow kits from mjmods.com. This morning I came downstairs to the sound of one of them trying to spin backwards and slamming into the acrylic stop peg. It never was able to get itself spinning correctly so I unplugged it several times and still no luck. Left it unplugged and went to work. Then when I got home from work the other was doing the same thing! :mad2:

I'm sure it is something I have done wrong but I have no idea what. I followed the direction perfectly...everything is balanced and when it is spinning the right direction it produces a ton of flow...

Has anyone else had this problem?! :confused:

[ToTaLCHaoS13]

I need help! I made two mjmod's using mj900's and the low-flow kits from mjmods.com. This morning I came downstairs to the sound of one of them trying to spin backwards and slamming into the acrylic stop peg. It never was able to get itself spinning correctly so I unplugged it several times and still no luck. Left it unplugged and went to work. Then when I got home from work the other was doing the same thing! :mad2:

I'm sure it is something I have done wrong but I have no idea what. I followed the direction perfectly...everything is balanced and when it is spinning the right direction it produces a ton of flow...

Has anyone else had this problem?! :confused:

[ToTaLCHaoS13]

I need help! I made two mjmod's using mj900's and the low-flow kits from mjmods.com. This morning I came downstairs to the sound of one of them trying to spin backwards and slamming into the acrylic stop peg. It never was able to get itself spinning correctly so I unplugged it several times and still no luck. Left it unplugged and went to work. Then when I got home from work the other was doing the same thing! :mad2:

I'm sure it is something I have done wrong but I have no idea what. I followed the direction perfectly...everything is balanced and when it is spinning the right direction it produces a ton of flow...

Has anyone else had this problem?! :confused:

[BigSkyBart]

problem get you a little excited?
(triple double post)

No help here, I still have not made mine, but will be doing so shortly

[got2lb]

HOLY CRAP!!! Ease up on the trigger! :lol:

I had the exact same problem with my 900. All I had to do was shave a little bit off the prop with some sandpaper and it started working just fine.

[twokayaks]

Had the same problem. Just took off the shroud, held the tip of the carbon fiber shaft with my middle finger, the back of the motor with my thumb, plugged it in, then held some sand paper to the spinning prop. haven't had a problem since then.

[Aquatic Island]

Can someone put together a shopping list for parts and where to buy them to mod MJ900 and MJ1200?

[N-A-S-O]

www.mjmods.com

[elmatth1]

I posted about using these magnets to mount my MJ mod on the previous page http://www.magnet4less.com/NB065.html... Well, i ordered them from a different site and found out quick that they have no place in this hobby unless it's to hold your stand together!!!! I accidently let them get too close (about 9 inches apart) and they flew out of my hands toward each other. They are way too powerful to trust on opposite sides of glass! I had to use all my strength to twist and pull at them to get them apart, and i'm not a small guy either! Thought i'd give you an update in case someone else was thinking about ordering them too.

[elmatth1]

I decided to just be safe and order the simple magnet mounts from MJ Mods: http://www.mjmods.com/.

[N-A-S-O]

well Approximate pulling force: 73 lbs would explain why

[N-A-S-O]

try these: http://www.kjmagnetics.com/proddetail.asp?prod=RX054E

[lmkjma]

24lbs of force is all you need. I built some magnet pump holders for my neighbor who has a 150gal. I think the glass is around 1/2" thick, plus the thickness of the plastic mount worked out perfect. Anything more than that and it wouldn't hold.

[Snarkys]

<a href=showthread.php?s=&postid=9120098#post9120098 target=_blank>Originally posted</a> by N-A-S-O
try these: http://www.kjmagnetics.com/proddetail.asp?prod=RX054E

this is broken glass waiting to happen : )

[N-A-S-O]

please explain master jedi???? :D

[Chrismo]

I epoxy'd a magnet with a pull force of 73lbs to my mjmod, and it is fine. The agnet on the outside of the glass doesnt need to be as strong. (Actually I keep it in an Ipod sock so I can pull it off easier.

If you use strong magnets, make sure when you put them together through the glass, you first place them on the glassaway from each other, THEN slide them together.

With .5" of glass between the magnets, it's not that hard to get them apart. PLus witht he extra strength, you can mount rocks or corals to your MaxiStream Shroud.

But of course.. Be carefull. These magnets can "bite".

Chris

[Snarkys]

<a href=showthread.php?s=&postid=9129743#post9129743 target=_blank>Originally posted</a> by N-A-S-O
please explain master jedi???? :D

I was going to sell something like these until i played with them a bit. Unless you are ready for how strong these are it is really easy for one to come flying out of your hand at the glass : (

if you are extremely careful with them all the time id say they work very well but it only takes once ...

stupid magnets are the most dangerous thing in my shop . they feel so inert and safe in your hand until you swing your hand to close to another one ... then suddenly you have two magnets with 70 pound of force each pinching a fold on your skin ...would be pretty easy for one of these to pop out of your hand and hit the glass if you were not ready for it.

[bosborn1]

Does anyone remember where the thread was about that Seaswirl like device that you attached the maximod too to create a occsilating wavemaker??

Thanks
Scott

[Aquatic Island]

What are the dimensions (hole size, propeller wing span) of the Dumas 3004 propeller?

[Aquatic Island]

This is what I see listed on the net for the dimensions of the 3004. I assume that the 3/16" is the hole size. How about the .19-.35?

Dumas Plastic Prop 3/16" .19-.35

[bosborn1]

NM I found it...

Scott

[hahnmeister]

I wonder, what is the pitch of the 3004...??

[Aquatic Island]

check this site out for the specs of the Dumas

http://www.dumasestore.com/catalog/index.php?cPath=72_74&osCsid=432ede44b786f750829f026de55dd56f

Dumas 3004:
Item Description
1.75" Dia. 1.50" Pitch Left Hand 3/16" Bore
Prop #3004 for .19 to .35 Size Engine 3/16" Hole

[hahnmeister]

So a 1.75" diameter and a 1.5 pitch.... so thats a total pitch of 2.625 Hmmm... I thought my 1.38" octura was pushing more. The octura 2035 is small enough to use with 1.5" pipe, yet has a total pitch of 2.760... more than the dumas 3004. Yet its diameter is small enough that its startup torque requirements are much lower... and once the pump gets spinning, it no longer makes a diff.

I know it sounds odd, but IMO, the octura 2035 is the largest prop you can use on a MJ1200... not because of its diameter, but its pitch (2.0).

[Aquatic Island]

hum...i dont know anything about this.

anyone has any input?

[Aquatic Island]

How long should the carbon fiber tube be for the MJ1200 mod?

[Snarkys]

<a href=showthread.php?s=&postid=9165588#post9165588 target=_blank>Originally posted</a> by hahnmeister
So a 1.75" diameter and a 1.5 pitch.... so thats a total pitch of 2.625 Hmmm... I thought my 1.38" octura was pushing more. The octura 2035 is small enough to use with 1.5" pipe, yet has a total pitch of 2.760... more than the dumas 3004. Yet its diameter is small enough that its startup torque requirements are much lower... and once the pump gets spinning, it no longer makes a diff.

I know it sounds odd, but IMO, the octura 2035 is the largest prop you can use on a MJ1200... not because of its diameter, but its pitch (2.0).

while this is theoretically true i think there are different forces in play here. I have put the 2035 on a 1200 countless times with a variety of different shrouds and they don't come close to the output of the output of the 3004 Dumas. however if you use a smaller shroud they can feel stronger because the flow is coming out of a smaller hole.

[hahnmeister]

Well, these props are designed to go many times faster than the 1800rpm that our AC powerheads can do, so I doubt we are approaching the point of efficiency where the pump is spinning the blades so fast that they intersect each other's water path
(slippage). The concentration of the flow is a good point... but isnt that the point after all? I can have a prop that is 4" in diameter on a MJ1200, but with such a small pitch that yes... it will move the same volume of water... but in the same note... it wont create enough velocity to move any water more than 12" away from the prop.

[Snarkys]

I should note that i also had reliability problems even on the 1200's. Id say 25% of them wouldn't run properly and liked to reverse a lot. This was before we started using the low friction thrust washer though, maybe that would help.

if i get some spare time i will build a couple and bag test them. prolly wont be soon though. sure would be nice if we could shrink the housing even more : )

[dwdenny]

ok just a few questions. I have a 900 sitting here and I was thinking at about 1200gph or so I would only need one on my 40g breeder. I was thinking with the return from sump then one is all I need. Or should I add one of those Koralia #1 pumps to the mix.

Thanks
Doug

[hahnmeister]

That Octura 2035 I was talking about is being used in a 40B. Its on an oscillating mount as well that turns it 120degrees as well. Thats a whole lot of flow, but it suits the 40B just fine. I should point out that while my mod makes alot of flow, 9" or more from the outlet you can barely notice it with your hand. If you make the mod with the prop as close to the outlet as possible, you get a very wide outlet, like a 90degree cone really. If you have the prop deeper in the shroud, it focuses the output into a beam more, and will project farther.

Id just stick with the MJ1200. Its just easier to have a pump that you can run any size prop with, and go from there. The wattage will depend on whatever prop you put on the mod. If you only put on a dumas 3002 prop, then you will get the same wattage as a MJ600 with the same prop... but the MJ600 cant run a dumas 3004 like the MJ1200 can.

[dwdenny]

hahn so your say I should go with a 1200? I guess if I place in the the back of the tank hitting the front then it shouldn't be to bad.

[hahnmeister]

Mine is at one end facing the other side. It barely reaches halfway across the tank before it diffuses. It still moves water around the whole tank, but its a gentle current across everything. The depth of the prop in the shroud is something you may want to play with.

[dwdenny]

Thabks for the info hahn

[vicmiller]

worst purchase I have made in 10,000.00 of reefing

[dwdenny]

D. have you made any changes to your version on page 26 of the original thread. It looks like the shroud is only about 3" or so long about did you use 1.5" PVC. Is that a 900 that you put it on?

[cashman95]

I have just recently built a Maxi-Jet mod that I bought from Reef-Chili, and yes I took my time building it trying to make sure everthing was true. This damn thing rattles so bad that I had to take it out of the tank! Can someone please help me?

[ostrow]

Anyone know how to remove CA Hobby Glue from a surface?

Some dope glued the shroud onto a MJ900, using the mjmods kit. Sold the pump with mod and extra high flow kit here on RC a few days ago. I bought the package. He never said he glued the shroud on. Man oh man.

So, how to remove it without destroying everything? Any hope?

[got2lb]

I think acetone will remove superglue. Not sure what effect it will have on the plastic though.

[Rusalka]

Acetone will disolve plastic.

You can "break" a CA bond with heat, but then again, you will end up melting the plastic housing.

[dhnguyen]

<a href=showthread.php?s=&postid=9212323#post9212323 target=_blank>Originally posted</a> by dwdenny
D. have you made any changes to your version on page 26 of the original thread. It looks like the shroud is only about 3" or so long about did you use 1.5" PVC. Is that a 900 that you put it on?


That's the small/medium flow mod that I did. I no longer use the double prop design as I found that it didn't really increase the flow that much more while at the same time generate a lot more vibration and noise.

Yes that is a SCH 80 1.5" pipe, the entire shroud length is about 2-2.25 inches or so. That was a MJ900 also.

[dhnguyen]

<a href=showthread.php?s=&postid=9216691#post9216691 target=_blank>Originally posted</a> by ostrow
Anyone know how to remove CA Hobby Glue from a surface?

Some dope glued the shroud onto a MJ900, using the mjmods kit. Sold the pump with mod and extra high flow kit here on RC a few days ago. I bought the package. He never said he glued the shroud on. Man oh man.

So, how to remove it without destroying everything? Any hope?


Have you tried CA glue debonder?

[ostrow]

No. I'll look to get some of that. How would you use it? I'm leery of dipping the entire shroud, pump end in it. Do you paint it on???

[dhnguyen]

<a href=showthread.php?s=&postid=9222826#post9222826 target=_blank>Originally posted</a> by ostrow
No. I'll look to get some of that. How would you use it? I'm leery of dipping the entire shroud, pump end in it. Do you paint it on???


You use it as you would CA glue. Just apply it on the area and let it sit. Depending on how much glue was used on the original bond, you may have to do several debonder applications.

D.

[ostrow]

Thanks Danh. I'll hunt for this stuff soon.

[brandon0350]

i have two mj1200s and id like to do this mod but i think it would be to much for my 40 breeder 36x18x16 w/ a ssb what do you think?

[dhnguyen]

That depends on what propellers you used. The large Dumas 3004 would definitely be too much for that tank but you would probably be ok with the Octura 1435

[Aquatic Island]

Danh,

How long should the carbon fiber tube and rod be cut into for the MJ1200 using Dumas 3004?

How long is the shroud? diameter of the shroud?

[dhnguyen]

My shrouds are pretty short now 2-2.25 inches or so
The SS or CF rod is around 3.75 inches long and the CF or rigid air tube should end at about 1/2 inch from the rod.

The diameter of the shroud is up to your preference really, the larger it is, the more dispursed the flow will be. I typically use a 1.5 inch PVC slip coupler for Dumas 3004 which has an ID of about 1.875 inches or so.

[Shroom King]

I finished my maxi-stream 1200's with mjmod housings, dumas 3004 props, carbon fibre tube, stainless rod, and kapton washers. They appear to be working flawlessly in the "tub test".

What's everyone been using for magnet mounting. I was thinking of using the magfloat 350's and gluing them to maxi-streams. Anybody having success with this? Which glue? Any better ideas??

Thanks!

[olemos]

Sorry if this was debated already, but the tread is to big to read.
Why the reason to use propellers with 2 blades and not the ones with 3 or 4 ?

[dhnguyen]

Mainly because 3 or 4 bladed props made out of plastic aren't exactly easy to find.

[kamla]

Shroom King - how about a pics of it in ur tank...

[hahnmeister]

Quick Q... what prop might be in between an octura 1470 and a dumas 3002? Im looking for that sweet spot in between... the octura is too much on my pump that rotates... causes alot of trouble... but the 3002 just doesnt quite reach as far or blow as well.

The only options I could come up with off the top of my head were to either trim up the octura a little bit, or try to place it even closer to the outlet so it blows a wider cone of output. But I would like to know if there is a prop right in between.

[dhnguyen]

Hahn--- A few more options for you to check out


Octura:

1465
1462
1462R
1460
1457
1457R
1455
1450
1445
1440


Are those enough? :)

[hahnmeister]

Im sorry... I meant 1435, not 1470...

[cthetoy]

Does the kites sold at Walmart contains the carbon fiber rod still? I need 6" worth and did not want to order a $2 rod online with $6 shipping.

[cyslyde]

ok maybe i missed it but is there any idea/way of testing how much flow we are getting out of a 1200 with a 1440?

[dhnguyen]

<a href=showthread.php?s=&postid=9293725#post9293725 target=_blank>Originally posted</a> by hahnmeister
Im sorry... I meant 1435, not 1470...


The inbetween (3002 and 1435) props:


Nitro Hammer http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXMNM5&P=0

or

Octura:

X431
Y531
Y534

[jamesnmandy]

new guy here, so please take it easy on me if i missed something, but i have been using the search feature as well as scouring all of the multiple split-up threads on this topic and have yet to find a straight answer....

i understand i can mod my MJ600's, but what exactly differs in parts between the MJ900/1200 mods and doing it to a MJ600 (other than obvious prop size), does the same PVC shroud fit as on a MJ900?

can i order a MJ900 kit from MJmods.com and it fit correctly on my MJ600 or would i need to do further modification to it....or would i be better off building it myself? i am thinking the diameter of the shroud would be different or no? i do not have a table saw or mitre saw but have other various tools and i am not scared to use them ;)

thank you

** oh, forgot to mention, i intend to do this to one or both of my MJ600's in my 35 gallon hex as i intend to get into corals in the future, do you think one modded would be enough flow or should i do both? my worry is that if i dont do both, i will get too much flow in one direction, that the other non-modded MJ600 will not be able to create enough flow to counter the modded MJ600 in order to create proper cross flow, although i did do the simple mod to the MJ600's already (drilling holes in stock shroud and cutting output which seems to have nearly doubled the stock MJ600 output.....sorry if this is confusing....

[dhnguyen]

jamesnmandy


The shroud from mjmods.com will fit any maxijet pumps regardless of model. That's the beauty with the MJ pumps is that they all have the same fittings and you can swap parts between them if needed.

You won't be able to use the Octura 1435 prop though on the MJ600 unless you file or trim it down some. Or try the propellers I meantioned above.

The big difference between a MJ900, a MJ1200 and a MJ600 is the impeller. To mod the MJ600 you will need to break off the plastic top in order to slip the inner tube out of the magnet then glue the rigid airline inside.



D.

[jamesnmandy]

<a href=showthread.php?s=&postid=9306665#post9306665 target=_blank>Originally posted</a> by dhnguyen
jamesnmandy


The shroud from mjmods.com will fit any maxijet pumps regardless of model. That's the beauty with the MJ pumps is that they all have the same fittings and you can swap parts between them if needed.

You won't be able to use the Octura 1435 prop though on the MJ600 unless you file or trim it down some. Or try the propellers I meantioned above.

The big difference between a MJ900, a MJ1200 and a MJ600 is the impeller. To mod the MJ600 you will need to break off the plastic top in order to slip the inner tube out of the magnet then glue the rigid airline inside.



D.

so if i order the MJ900 kit it will work fine, but i would simply have to reduce the size of the blades on the propeller that comes with it

ok, great

so what do you think about having two modded 600's in that 35 gallon tank?

[dhnguyen]

Unless you are planning on having SPS in that tank 2 MJ600's maybe a bit much

[jamesnmandy]

yeah, i was thinking the same, but i do want to have the ability to keep anything i might get a notion to...

i think one would create too much flow in one direction....

[wakeboarder2342]

I just modded a mj750 with the 900 kit from mjmods and it is being used in my 30 gallon frag tank with bare bottom. IMO you would NEVER want 2 of these in a 35! 1 in a 30 is more then enough and is bordering to much flow even bare bottomed.



On a second note, i was looking at doing 2 more of these for my 180 and thought that 25 bucks seems like a lot of money for about 4 dollars in parts. I can find the prop and tubing ect but the shroud seems to be the problem and they want 17 bucks plus shipping for it!


has anyone found a better alternative for this? If you go buy a mj1200 and then pay 25 bucks for the mod you are at over 50dollars shipped which isnt bad but considering its only a few dollar prop and a few cents in tubing thats a bit much.

any alternatives?

[dhnguyen]

<a href=showthread.php?s=&postid=9314545#post9314545 target=_blank>Originally posted</a> by wakeboarder2342
...any alternatives?


Make the shroud yourself? :)

I expect that the $25 is mostly labor cost in cutting the shroud and etc...

The parts are cheap.

If you think that's expensive you should have seen what OceanFlo was charging for their mods :)


D.

[ostrow]

Danh, want your opinion. You made a few of the mods for me a while back and the high flow 1200 is still running.

But every few weeks I have to replace the thrust washer (indicator is the pump starts "chattering" -- then rights itself). It's not pulsing on and off , it's always on. But these washers are disintegrating, even the nylatron ones.

What could be causing this and what's the fix?????

[dhnguyen]

The propeller jumping back and forth is usually a sign that you are riding on the dege of what the pump is capable of doing. Try trimming/shaving the propeller down a bit. Not sure about the washer wearing out so quickly though. I used the regular nylon washers from Home Depot and never had any disintegrated yet.


D.

[ostrow]

The first ones Snarky sold didn't hold up. Krypton? Something like that. You think it's the pump, huh? Hmmmmm..... How do you trim the prop? Just sand it?

[kroe]

IMO the washers are not necessary. Try running without them.

[ostrow]

IME they are absolutely necessary. Prop will intermittently jump around without them. 3 different MJ1200s, with both props.

[jacmyoung]

I don't know if any discussion was made on this item it just clicked with me. I have been always aware that all the powerheads' impeller assemblies allow near one full rotational play between the shaft and the impeller. Only after working with my Tunze nanostream mod did I realize such play is crucial for a stream pump to jump start a large prop.

The MJ mods so far have a solid attachment between the prop and the drive unit (shaft and magnet), therefore require a large enough pump to jump start a small prop because of the inertia.

For example, it was agreed a MJ600 will not be able to drive a 1435, but the Tunze Nanostream's prop is the same size and pitch and starts just fine because of the play between the shaft and the prop. And the Tunze nanostream has a mini prop drive unit (magnet).

In another word if the same design is available among the street hobby props, the MJ1200 may be able to drive an Octura 2035 just fine.

Of course it is impossible to mod the available street props into something similar to the props/impellers on the stock powerheads or stream pumps. Simply too much precision is required.

[quangtam7]

My very first mod long ago, as you can see prop was not attached to the magnet. Second pic, Dumas 3004 (1.75") did not have problem spinning on very old mj500 at all.
http://www.dfwmas.org/Forums/UpLoAdS/maxijetmod1_292.jpg
http://i3.photobucket.com/albums/y86/tamhoabao/jetstreamer2.jpg

[jacmyoung]

Yes, another logical attempt would be to remove the blades on the impeller and securely attach the prop onto the impeller body.

The weight of the prop may also be a factor. May be trimming the prop center down as much as possible or find a prop that has much less mass at the center.

It is obvious the driver unit needs to find a sweet spot to jump start the revolution, with the prop adding a big drag it can not move. The play created by the stock impeller unit is designed to overcome that.

[dhnguyen]

Already been done jacmyoung.

The additional revolution may buy you a little bit of start up torque but it won't be enough to keep it running.

The MJ500 mod quangtam7 did may run fine without a shroud. I doubt however that it would run once you put a shroud cover on.

[quangtam7]

It ran fine with or without the shroud but the flow is no where near mj 1200. In fact, it always started right direction even without the stopper.
http://i3.photobucket.com/albums/y86/tamhoabao/jetstreamer.jpg

[kookerson]

Wow....5 splits, guess this is a hot topic huh? Anywho....Im a newbie and am just wondering what the purpose of the stopper is for. I thought the props are suppose to be glued in place on the tubing......so how does the stopper work?

[dhnguyen]

The stopper is there to prevent the propeller from spinning backwards.


Basically if it is spinning in reverse and pulling in water instead of pushing, it will lift the magnet out of the motor body then hit the stopper, stop spinning, the motor's magnetic field will pull the magnet back in and the propeller starts spinninging the right way. This all happens rather quickly on start up.

[hahnmeister]

Well, if the prop has a steep enough pitch to it, it may not need a stopper. with the 1440s and 2035s, the prop pulls itself out so far when it runs in reverse that it has to change direction or the magnet will be pulled forward. The prop will hit the cross bar (or without a cross bar, the prop assembly willl launch itself across the tank) and then try to fall back into place if it changes direction. When running a small prop on a larger magnet... say, a dumas 3002 on a MJ1200, then the magnet is too strong for the prop to even pull the prop forward to hit the stopper.

[kookerson]

Alright....Ive got everything I need to do this, but Ive got an issue. Is the metal rod suppose to be REALLY tight when you put the rigid tubing over it, or a little loose. Im trying to get this rod through the rigid tube and it is REALLY tight, even after I bored it out a little......

[dhnguyen]

no... The SS shaft should spin freely within the rigid tubing.

[chbarber]

What can be used as the center metal rod for this mod? Something like welder rods?

[kookerson]

Im using stainless steel....but others have used Titanium and Carbon fiber rods......Im sure you can use pretty much anything thats strong and wont corrode in saltwater.

[WBrian]

OK,
Great thread. I'm not much of a DIY'er, so I purchased the MJMOD version of this. I have a 65 gal tank, and wanted flow from both sides of the tank. Well, the Dumas 3004 was overkill (it turned my tank into a snowglobe!). SO I downsized the props a bit and I'm happy with the flow. What I don't like is the positioning of these. I bought some of those magnetized scrapers and they're too weak to hold the PH to the glass. I'd like to see if anyone has come up with a holder for these mods that works like the hang on strap, but longer? The I could position the mod about half way down the side. Can 2 of the existing hanging brackets be fused together to make one longer strap?

If not, what kind of magnet are you using (a link would be great!)? And how are you affixing it?

Thanks!
Brian

[ellisz]

The sure grip works with these with a little silicone. Or build an acrylic hanger. The thin stuff from HD and a a lighter to bend it has worked for me in the past.

[kookerson]

oops

[kookerson]

<a href=showthread.php?s=&postid=9498615#post9498615 target=_blank>Originally posted</a> by WBrian
OK,
Great thread. I'm not much of a DIY'er, so I purchased the MJMOD version of this. I have a 65 gal tank, and wanted flow from both sides of the tank. Well, the Dumas 3004 was overkill (it turned my tank into a snowglobe!). SO I downsized the props a bit and I'm happy with the flow. What I don't like is the positioning of these. I bought some of those magnetized scrapers and they're too weak to hold the PH to the glass. I'd like to see if anyone has come up with a holder for these mods that works like the hang on strap, but longer? The I could position the mod about half way down the side. Can 2 of the existing hanging brackets be fused together to make one longer strap?

If not, what kind of magnet are you using (a link would be great!)? And how are you affixing it?

Thanks!
Brian

I remember reading in his original thread that Bulldozer tried glueing the original triple suction cup holder (the one that comes with the maxijet) directly to the back of the powerhead....anyone ever hear if it worked out or not?

[NoCarrier]

I just started using magnets to keep my mods in place and they're giving off a fair amount of vibration. I layed on the silicone pretty thick when I glued the magnet to the maxi-jet, about 1/8". Think I need more?

[Jon770]

<a href=showthread.php?s=&postid=9499979#post9499979 target=_blank>Originally posted</a> by kookerson
I remember reading in his original thread that Bulldozer tried glueing the original triple suction cup holder (the one that comes with the maxijet) directly to the back of the powerhead....anyone ever hear if it worked out or not? I've done it. The gluing part works fine...it's the suction cups that give out after a while. Believe me - the sandstorm is not worth it (I've lost a few frags that were on the sand and got buried before I got home from work).....

just get the magnets.

[Rhodesholar]

Great thread. Great idea. Works awesome.

One question. I remember reading it but this thread is so long I can't find it. If the mod is making noise, what was the remedy? The noise started after it ran a few days. It was silent for a about a week, then started making noise.

If that helps any.

Thanks.

[Rick2203]

<a href=showthread.php?s=&postid=9499979#post9499979 target=_blank>Originally posted</a> by kookerson
I remember reading in his original thread that Bulldozer tried glueing the original triple suction cup holder (the one that comes with the maxijet) directly to the back of the powerhead....anyone ever hear if it worked out or not?

this is how i am holding up my MJ1200 mod i used the triple sucktion cups and glued it to the top of the maxi wich is now the side of the maxi, it has not fallen off its pretty sturdy.

[Rick2203]

<a href=showthread.php?s=&postid=9499979#post9499979 target=_blank>Originally posted</a> by kookerson
I remember reading in his original thread that Bulldozer tried glueing the original triple suction cup holder (the one that comes with the maxijet) directly to the back of the powerhead....anyone ever hear if it worked out or not?

this is how i am holding up my MJ1200 mod i used the triple sucktion cups and glued it to the top of the maxi wich is now the side of the maxi, it has not fallen off its pretty sturdy.

[Rick2203]

<a href=showthread.php?s=&postid=9530450#post9530450 target=_blank>Originally posted</a> by Jon770
I've done it. The gluing part works fine...it's the suction cups that give out after a while. Believe me - the sandstorm is not worth it (I've lost a few frags that were on the sand and got buried before I got home from work).....

just get the magnets.

did your maxi come with the big suction cups or the small ones, i had an old maxi that came with the small suction cups, that they come lose after a while, but the new maxis i bought come with the suctioncups that are almost double the size of the old ones and they hold pretty tight.

[kookerson]

Alright.....I finally completed the assembly..... and it works great, even though I only used one prop, I didnt want too much flow. But it seems that no matter what I do, i cant get rid of that rattling noise, everything is as centered as I can get it......so is there anything else that it could be?

[Jon770]

I'm not sure if mine were the big or small ones, as all my MJs have the same size. I would say they are probably about the size of a quarter.

But I would still say that ANY suction cup will give out over time...especially when trying to hold something like the MJ-Mod.

[Rick2203]

you can always use that plastic hook thing that came with the MJ thats pretty secured.

[kookerson]

hey guys, im really havin' a hard time with this noise issue. I think Ive tried everything possible, but it still rattles. However, sometimes when i start it up to test it, it starts backwards. Ive discovered that everytime it starts backwards.....it is dead silent, but then I stick my finger in there to get it to spin the other way, and it rattles back up again........any suugestions?

[lmkjma]

Here's what I'm doing that others have already done.

I take some plexiglass and make it about a 4" square. Then I trim out a hole and drop a Neo Magnet in it and glue a thin piece of plexi to seal it up.

Then I use some nylon screws and use the triangle mount from the MJ kit and attach it to the plexi glass.

I'm able to move it any where I want. Corners are a problem. The magnets have about 24lbs of force.

Hope this helps...

[MayoBoy]

How far below the surface do these need to be mounted so they don't vortex? I'd like to try one on my Wavysea.

[elmexotics]

WOW!! What a diiference in flow. getting ready to do my other one. I did the 600's and can't wait to do the 900's now.

[Rick2203]

<a href=showthread.php?s=&postid=9499979#post9499979 target=_blank>Originally posted</a> by kookerson
I remember reading in his original thread that Bulldozer tried glueing the original triple suction cup holder (the one that comes with the maxijet) directly to the back of the powerhead....anyone ever hear if it worked out or not?

this is what i did, i just crazy glued it to the maxi get and let it dry overnight and have no problems with it it holds pretty good

[surfjeepzx]

<a href=showthread.php?s=&postid=9567648#post9567648 target=_blank>Originally posted</a> by kookerson
Alright.....I finally completed the assembly..... and it works great, even though I only used one prop, I didnt want too much flow. But it seems that no matter what I do, i cant get rid of that rattling noise, everything is as centered as I can get it......so is there anything else that it could be?

I've done several of these mods now and have experienced several of the vibration issues. My mods were done using the carbon fiber rod and tubing I purchased at a local hobby store.

When you install the carbon fiber or rigid tubing through the magnet there are 2 things to look for which will cause vibration. The first is the rod must spin freely in the tube with absolutely no friction or bumps. You'll notice that when you remove the plastic piece from the magnet the hole in the manet is oblong. When you insert the rod through the magnet, if it's a tight fit it will make the tubing pinch. That in turn will oblong the inside diameter of the tubing.

In my case that happens each time I install the carbon fiber tube through the magnet. With the magnet installed on the tube I use a drill bit of the same size as the inside of the tube and slowly run it up through the tube past the magnet.

This rounds out the hole in the tubing and stops the vibration.

The other thing that causes vibration is mounting the magnet too far up the tube. Look at the plastic piece you removed from the magnet and compare that to the length of tubing exitting the magnet. There should only be about 1/4" or less. Make sure that the tubing is cut square also and is not at an angle.

I modded a 900 this morning for a friend that owns/operates an aquarium store and he was blown away by the flow a 900 produced with the 1435 prop. He now has asked me to build several more 1200 versions for some of his customers show tanks. What have I gotten myself into? :mixed:

So take your pump apart and recheck that the shaft spins freely, that the rod lentgh exiting the magnet is 1/4" or slightly less, and that the tubing is cut squarely and smooth.

[chirocato]

Is there a page on DIYing the vortex guards? Any ideas where? Thanks.

[coyoteseven]

OK, after reading this thread since the very first one (4 splits and 15 pages ago), I'm going to attempt to mod a couple of MJ900s I have... wish me luck. :D

[foshizzle]

<a href=showthread.php?s=&postid=8518543#post8518543 target=_blank>Originally posted</a> by dhnguyen
By the way for all intents and purposes, the original build method of using the flex airline tubing to connect the magnet to the propeller still works just as well as the new "tube in magnet" build. Just be sure to remember to use the black airline tube that came with the original Maxijet instead of the clear airline tubing and you should be fine. With the original build, it is the clear flex airline that eventually stretched, gave way, and failed whereas if you're using the black tube this won't happen.


I'm trying to dig up some of the black tube. Is this the glossy stuff?

[dpieroni]

Hello I have made with similar maxijet 1200 pumps and using octura 3004 and the flow are great.
I have mode also a 450gph pump and there seem no diference with the 280gph models.
One pump uses 13w and the biger pump use 26w.
Is there a bigger propeller to use in bigger pumps? perhaps a 2 inch pump?
Anybody know where to buy?
thanks
diego

[ellisz]

Been awhile since I have been on this thread but I have a question ...

I have a MJ1200 with a high flow kit from MJmods. It has the Dumas 3004 prop. I was working pretty good in my PH but then I noticed the piece that keeps the rod from sliding to the backside of the Maxijet was gone. It was causing the propeller assembly to sit too far bck and come out of the centering cap.

I tried a different MJ1200 and it keeps reversing itself. I put a stopper in the housing but it just causes the prop to comes loose from the shaft. I have tried trimming the prop a bit but it keeps doing it.

Do you think I could just keep trimming the prop until it stops or should i get a new MJ1200?

[dhnguyen]

<a href=showthread.php?s=&postid=9809080#post9809080 target=_blank>Originally posted</a> by foshizzle
I'm trying to dig up some of the black tube. Is this the glossy stuff?

yes

[dhnguyen]

<a href=showthread.php?s=&postid=10276336#post10276336 target=_blank>Originally posted</a> by ellisz
Been awhile since I have been on this thread but I have a question ...

I have a MJ1200 with a high flow kit from MJmods. It has the Dumas 3004 prop. I was working pretty good in my PH but then I noticed the piece that keeps the rod from sliding to the backside of the Maxijet was gone. It was causing the propeller assembly to sit too far bck and come out of the centering cap.

I tried a different MJ1200 and it keeps reversing itself. I put a stopper in the housing but it just causes the prop to comes loose from the shaft. I have tried trimming the prop a bit but it keeps doing it.

Do you think I could just keep trimming the prop until it stops or should i get a new MJ1200?


I am having a tough time visualizing what the actual problem is from your description. Any pics?


D.

[dhnguyen]

<a href=showthread.php?s=&postid=10276051#post10276051 target=_blank>Originally posted</a> by dpieroni
Hello I have made with similar maxijet 1200 pumps and using octura 3004 and the flow are great.
I have mode also a 450gph pump and there seem no diference with the 280gph models.
One pump uses 13w and the biger pump use 26w.
Is there a bigger propeller to use in bigger pumps? perhaps a 2 inch pump?
Anybody know where to buy?
thanks
diego

This is the only place I know that makes large plastic propellers.

Octura Models, Inc.
7351 North Hamlin Ave.
Skokie, Illinios 60076
(847) 674-7351

You have to mail or call them for a catalog and all ordering are done via phone or regular mail as well. I am pretty sure they also ship outside the US.


D.

[ellisz]

If you pull off the little plate on the top of the MJ, you will see a round piece. I now have one where this piece is gone and you can see all the through to the bottom of the MJ. When you put the impeller assembly in the MJ, the black/red cap on the SS shaft actually sticks through to the other side. Make sense? I am not sure if this is even fixable...

I just pulled the impeller assembly & shroud with the Dumas prop and put it in a different MJ1200. It has trouble spinning the correct way though. It starts good but when I come back later, it is sucking water instead of pushing water. I added the acrylic stopper but it just causes the prop to be knocked loose. I would like to use the kit without buying a new MJ.

Thanks

[ellisz]

I took the prop out and put it in a drill and ran it over some sand paper. The prop is still reversing direction on its own. Can I try and shae off some more of the prop or would moving the prop down more on the shaft help?

I love the flow but the hammer coral right underneath hates it when it switches!

[dpieroni]

Thanks, I have the catalog, the problem is that there are two many props and do not know which can be usefull.
I can see that the octura are same in diameter but bigger on the high of the propeller.
Can someone tell which propeller can be used?
thanks
diego

[ellisz]

I took the sand paper to it again and it is finally staying in the same direction! Very nice flow ...

[Joshsmit56001]

I ordered my mjmods high flow kit and can't wait to do this mod, my corals will love it!

[Joshsmit56001]

I modded my MJ 1200's with the highflow kits from mjmods.com and I am having a lot of vibrational noise from both pumps. I tried everything I could to minimize the noise but it is still really annoying. The prop spins freely on both powerheads but just has a vibration to both. Is there something I can do to fix this issue?

[dhnguyen]

how much play is there between the rigid tubing and the stainless steel shaft? If there is too much it will cause excessive vibration. You may need to find yourself a rigid tube with a smaller inside diameter.

D.

[RichConley]

How is the pump attached? When I tried to use suction cups/etc, it made a bit of noise. When hard mounted to magnets, they were dead quiet.

[Joshsmit56001]

Whatg magnets did you use? My glass is at least 1/2", closer to 5/8". It is a 150 gallon.

[Wett Hands]

Well I modded 2 mj1200's thursday and put them in my tank last night...

One using black fiber tube, one with clear rigid tube. I knew right away that the fiber tube would out perform the clear because the shaft spun smoother and got more revolutions when I spun it with my finger. The shafts were a hair long and caused the shroud's cap to come off: Easy fix, A few seconds with a dremel and problem resolved. Once assembled I had a problem with the shroud popping off from the force of the prop hitting the stopper. One small drop of superglue fixed that. After that I turned them on and...

HOLY @#$!:eek1:#! The flow these things put out is awsome! I'm not sure my juvie clown liked being sent across the tank into the glass.:lmao:

One 1200 is using a bracket to hang on tank. Some noise/vibration issues. It was too close to water level, even with the guard in place I got a pair of funnels on each side that would occasionally pull air into the shroud. I had to get them 3 1/2 - 4 inches below the surface to prevent this. that normal?

The other 1200 is attached with magnets. They are homemade and not as secure as I'd like it to be but infinately quieter. I will get stronger magnets later.

The surface of the water is pretty turbulant, almost too much so. I tried to lower the power heads a bit but then it kicks up sand. I still have a cloud/some haze that dosent seem to have settled. Hopefully when I get home from work the water will be clear again. Think I should use my canister filter if it's not?

I'm wondering if 2 1200's are too much for my 75 gal...

TIA in advance for suggestions everyone!

[dngspot]

After spending some time working on the shroud I have finished two AC-70 stream mods. They are putting out pretty close to 3000 gph, as per a bag test. The two are facing each other and about six inched below the water, every now and then they will create a 2 inch deep whirl pool in the center of the tank. My tank is 6 feet wide.
I took Ball's advice and used wildcat 1.5x1.5 props. The shaft is made from a pen, that has a key way cut into it for the impeller magnet. On the other end I installed ro tubing, then nylon screw and prop.
It does start backward some times but this is fine, it is correctible when the power is turned off then on.

http://www.wichitaaquariumclub.com/photopost/data/500/medium/DSCF0008.JPG

[Wett Hands]

<a href=showthread.php?s=&postid=10391687#post10391687 target=_blank>Originally posted</a> by dngspot
...They are putting out pretty close to 3000 gph, as per a bag test...

Whats the 'bag test' ?

[RichConley]

Just a tip for you guys:

Take the stainless/carbon shaft, and feed it into a dremel like a bit. Tighten up the collet, and slip the shaft inside the airline/carbon tube, and turn the dremel one for a minute or two. It'll smooth everything out, and make them run much quieter.

[dngspot]

<a href=showthread.php?s=&postid=10398867#post10398867 target=_blank>Originally posted</a> by Wett Hands
Whats the 'bag test' ?
I used a 2.5 gallon plastic bag and put it over the outlet of the pump. I then turned the pump on and watched how long it took to fill the bag. It took 3 seconds.
Divide the seconds into 60, take that total and multiply the size of your bag, take that total and multiply it by 60 and you will have total gph.
My example was 60 divided by 3 seconds to fill the bag =20. 20X2.5 gallon bag=50 gallons. 50X60 minuets=3000 gph.
Hope this helps and does not confuse.
David

[Wett Hands]

<a href=showthread.php?s=&postid=10399146#post10399146 target=_blank>Originally posted</a> by dngspot
I used a 2.5 gallon plastic bag and put it over the outlet of the pump. I then turned the pump on and watched how long it took to fill the bag. It took 3 seconds.
Divide the seconds into 60, take that total and multiply the size of your bag, take that total and multiply it by 60 and you will have total gph.
My example was 60 divided by 3 seconds to fill the bag =20. 20X2.5 gallon bag=50 gallons. 50X60 minuets=3000 gph.
Hope this helps and does not confuse.
David

Cool,

Thanks I'm gonna test mine and see what I have. I just have to get the positioning correct now. Fish are hiding from the flow like it's tornado season... lol

[NoCarrier]

Has anyone tried running modded maxi-jets on a wavemaker? I wonder if the nylon propellers can handle the repeated slapping against the plastic stopper. I've already had one propeller rip upon startup.

[ellisz]

I found that on one of mine it would spin the housing when the propeller hits the stopper. Eventually it makes it to the notches and then the prop stops spinning.

[stolaas]

Hey everyone, after spending the entire evening and this morning going through 200+ pages I still havn't found the answer to my question. I have two maxijet mods that work great. I have two AQ's that are not moded but would like to be. I was wondering what is the best to use as a shroud and how you attach it to the powerhead. Next is the stopper issue, how was that solved it has been. Much help is needed. Thank you :)

[skunkmere]

anyone selling the mod kits besides mjmods? how do you cut the pvc down to fit in the mj's twist socket? i battled with a table saw and lost.

[dhnguyen]

You can use the existing twist lock from the MJ if you cut it out from the volute and glue it onto the PVC pipe.

[dhnguyen]

<a href=showthread.php?s=&postid=10498091#post10498091 target=_blank>Originally posted</a> by stolaas
Hey everyone, after spending the entire evening and this morning going through 200+ pages I still havn't found the answer to my question. I have two maxijet mods that work great. I have two AQ's that are not moded but would like to be. I was wondering what is the best to use as a shroud and how you attach it to the powerhead. Next is the stopper issue, how was that solved it has been. Much help is needed. Thank you :)

Hahmeister and Ball did the same mod for the AC piumps. I can't remember where but it is somewhere in one of the thread splits Sorry I couldn't be of more help. Maybe you should hit them up for it directly.

D.

[rbc1225]

<a href=showthread.php?s=&postid=10504280#post10504280 target=_blank>Originally posted</a> by skunkmere
anyone selling the mod kits besides mjmods? how do you cut the pvc down to fit in the mj's twist socket? i battled with a table saw and lost.

Just curious why don't you like the MJ Mods Modificaitons? They work very well.

Rusty

[skunkmere]

because their like 23 bucks. but i do like them, just wanted to know if there are any other sellers.

[stolaas]

My AC 50 mod. I used a black ABS 1.5" cupling to make the housing. Some use the 2-1.5 reducer for the AC 70 but that one must be a lot bigger.

Here are some pictures, They work great and are silent. The key was keeping the prop pretty close to the top and of course as stiff as possible. I used hard airline tubing like my maxi mods but to keep everything together I used semihard water tubing from lowes instead of the soft tubing which made it go wild and wouldnt stay straight.

With these extra pumps Im now pushing 43X turnover, well see how it effects everything. By the way, I do have a bare bottom so I have them pointed staight down.

http://reefcentral.com/gallery/data/500/127469AC50shroud.jpg
http://reefcentral.com/gallery/data/500/127469AC50inside.jpg
http://reefcentral.com/gallery/data/500/127469AC50_Maxi900.jpg
http://reefcentral.com/gallery/data/500/127469AC50prop.jpg

[skunkmere]

how did you cut the conneting side of the shroud? did you use a dremel ?

[stolaas]

I just set the fence on the table saw at the right distance as the tabs on the pump, then only have the blade just barely above the table top and just run the pipe over the blade to the highest point then twist it so (still against the fence) to create the ring. Put an extra peace of pipe on the cupling so it is easier and safer to work with so your fingers arent near the blade. Then to make the inlets just set the fence out farther and side the pipe across. A good idea from a much earlier post is to put an elbow on the extra pipe so you just flip it over and cut the other side so the groves are pretty.

[skunkmere]

cool thanks, i thinnk i need a new blade or mybe a fine tooth one.

[stolaas]

A fine tooth one would be nice but I am using a stanard "Fire" ripping blade but it is new. My old blade wouldnt cut anything.

[quangtam7]

I have made a smallest stream pump here, check it out.
http://www.dfwmas.org/Forums/viewtopic.php?t=35152

http://i2.photobucket.com/albums/y12/quangtam7/picostream2.jpg

[dhnguyen]

Did I read that right that the pico pump you used is 24VDC pump? Nice job BTW...

[stolaas]

Wow that is sweet, perfect for a small tank!

[skunkmere]

ooooh.

[quangtam7]

<a href=showthread.php?s=&postid=10509555#post10509555 target=_blank>Originally posted</a> by dhnguyen
Did I read that right that the pico pump you used is 24VDC pump? Nice job BTW...
Yes, it is 24vdc pump.
pics of it vs Maxi stream. Note that on Maxi stream, I have designed now that the rod spins along with magnet. Imo, it is quieter, the stopper is hidden and easier to make, the most difficult part is how to mount the prop onto the rod securely
http://i2.photobucket.com/albums/y12/quangtam7/pico3.jpg
http://i2.photobucket.com/albums/y12/quangtam7/pico1.jpg
http://i2.photobucket.com/albums/y12/quangtam7/pico2.jpg

[stolaas]

Very professional looking. Question - since you have the rod spinning with the magnet, is it still centered up top in the maxijet? If not, how did you keep the magnet from sticking the side of pump. Isnt that what the shaft is for, to keep the magnets apart so it can spin?

[ThaNgBOm321]

that is sweet!!!

YzGyz

[quangtam7]

The 3/4" carbon tubing keeps the magnet/prop centered (see pics). This is less complicate than old design, no damage to the prop and you don't have to worry about keeping the shroud perfectly centered
http://i2.photobucket.com/albums/y12/quangtam7/assembly.jpg
http://i2.photobucket.com/albums/y12/quangtam7/assembly2.jpg
http://i2.photobucket.com/albums/y12/quangtam7/assembly3.jpg
http://i2.photobucket.com/albums/y12/quangtam7/assembly4.jpg

[ThaNgBOm321]

AGIAN!!! SWEET!!!!!! imma try this one day...

YOU THE MAN!!!
YzGyz

[dhnguyen]

I see a couple potential problems here.
That spinning carbon fiber rod will drill itself right through the red/black end cap after some time. That stopper also looks a lot more complicated than say by using a small piece of rigid tubing. It also doesn't look like it would last very long either. There is a tremendous amount of starting torque from the MJ1200 and I think it will wear out the stopper before long as well. The deisgn looks cool though.

[stolaas]

quangtam7 - That is great intuition! nice usage of part around the house. I guess the test of time would be all that stands in your way. How long have you been running it now?

[RichConley]

what is the 24v pump?


also, whats the prop?

[quangtam7]

<a href=showthread.php?s=&postid=10534817#post10534817 target=_blank>Originally posted</a> by dhnguyen
I see a couple potential problems here.
That spinning carbon fiber rod will drill itself right through the red/black end cap after some time. That stopper also looks a lot more complicated than say by using a small piece of rigid tubing. It also doesn't look like it would last very long either. There is a tremendous amount of starting torque from the MJ1200 and I think it will wear out the stopper before long as well. The deisgn looks cool though.
The rod can not drill through the cap (does not matter if it can or not) because it is glued to the magnet and the magnet prevents it doing so, it can not go any deeper . The stopper is your own choice of matterial. you can cut both ends at an angle which is easier. The impact at the center is much less than perimeter, thus less noise, less damage.
Old design: the tubing/magnet spins against the rod, more friction, needs a brace on the shroud to keep it centered.
This design: the rod spins against the tubing, less friction and noise (since the cf tube is only 1/2-3/4"), vibration is almost none, no headache of dealing with the center hole in the brace to keep the magnet centered

http://youtube.com/watch?v=T6UwMeegl60&mode=user&search=

[quangtam7]

<a href=showthread.php?s=&postid=10536846#post10536846 target=_blank>Originally posted</a> by RichConley
what is the 24v pump?


also, whats the prop?
I don't know the name of the pump, got few from a friend. The prop is Dumas 1.25".
pic of new shroud
http://i2.photobucket.com/albums/y12/quangtam7/pico4.jpg

[happyface888]

Wow my eyes hurt, can someone post a build of a maxijet 600? I havent seen one of them thats posted. I am lost where you put the plastic into the magnet of the prepellar.

[happyface888]

Does anyone have pics for the maxi 600? I am kind of lost on how you stick the tubing into the magnet. I would appreciate the measurements for the outside casing and tubing and any info needed. My eyes hurt from reading all 5 splits. X.x Thanks

[happyface888]

will a octura 1435 work on a mj 600?

[happyface888]

bump need some help

[RichConley]

<a href=showthread.php?s=&postid=10539766#post10539766 target=_blank>Originally posted</a> by quangtam7
I don't know the name of the pump, got few from a friend. The prop is Dumas 1.25".
pic of new shroud
http://i2.photobucket.com/albums/y12/quangtam7/pico4.jpg

Its not labeled anywhere? Any chance you can talk to the friend?

I can't find small reasonably priced DC pumps anywhere.

[dhnguyen]

Here is what I think that pump is http://www.islandaquatics.com/product_detail.php?category_id=1&product_id=9

I have seen this miniature pump in action before and it outsout a generous amount of flow stock for such a tiny unit. Not sure if it's the same pump used in the mod but ...

[dhnguyen]

<a href=showthread.php?s=&postid=10599731#post10599731 target=_blank>Originally posted</a> by happyface888
will a octura 1435 work on a mj 600?


Some MJ600 pumps will while some won't.
Try sanding down the prop a bit.

[quangtam7]

This guy selling them, I think $5 each.
http://www.youtube.com/watch?v=rxd3ABUBEd4

[dhnguyen]

So according to that utube vid it IS an Aqua Globe

[happyface888]

I cant find it on ebay....

[happyface888]

PVsPlayHouse
This is what happened to my MJ mod has this happen to anyone else?
The impeller broke right through the back of the maxi Jet. It knocked
off the backing of the MJ and cracked through the plastic holder that
holds the Red and black bushing. I also cant find the o-Ring that came
with the Mod is this needed? Im going to use my other MJ with this mod but before I do, has this happen before? what can I do to make sure it does not happen again. I got the large mod with a bigger Prop. I think it was the 1440 but not sure.
http://pvsplayhouse.com/gallery/albums/album08/P9250280.jpg


I am curious to how did this happen? I just placed a order at mjmods for the stainless steel rod and I am worried that this might happen. What can I do to prevent something like that?

[FishAreFriends2]

If the prop were to spin in reverse would it have enough force to pull or shoot the magnet out of the powerhead? I am curious if I were not to use the shroud cap to position it in the middle, leaving it open would the prop be strong enough to send the magnet flying across my tank?

[dhnguyen]

<a href=showthread.php?s=&postid=10606126#post10606126 target=_blank>Originally posted</a> by happyface888
PVsPlayHouse


I am curious to how did this happen? I just placed a order at mjmods for the stainless steel rod and I am worried that this might happen. What can I do to prevent something like that?


Never seen this happened before wtih any of the mods I've done. My only thought is that the back end nub must have been damaged already where the extra push from the MJ mod just pushed it over the edge.

[dhnguyen]

<a href=showthread.php?s=&postid=10609081#post10609081 target=_blank>Originally posted</a> by FishAreFriends2
If the prop were to spin in reverse would it have enough force to pull or shoot the magnet out of the powerhead? I am curious if I were not to use the shroud cap to position it in the middle, leaving it open would the prop be strong enough to send the magnet flying across my tank?


Unless you have something to hold the magnet in, it WILL shoot out flying across your tank so to speak :)

[FishAreFriends2]

..that doesn't sound too cool, So I am guessing the centering plastic that is on the shroud is used to hold the rod, which would keep the magnet from flying out if it did spin backwards? DH have you experienced the magnet flying out of the powerhead while active in your tank?

[dhnguyen]

The center brace is used to hold in place and centered the shaft in which the magnet spins on. But it also serves to keep the magnet contained so that it will not fly off like that.

[deejayfish]

Dh is black abs pvc safe to use in fish tank? I heard it leached something but not sure.

[dhnguyen]

ABS is fine to use intank IMO/IME
Certainly no worse than PVC.

Actually every plastic (petroleum based) product used in water will leach something sooner or later.

My general thought is if it's safe to use for household plumbing it would be safe for your tank

[happyface888]

hmm since we are on the topics about flying magnets, has anyone had a incident where their magnet went flying and smashed into their glass window causing it to crack? Or its not possible for a magnet to have that much force while in water to crack a tank?

[dhnguyen]

not a chance that would happen. The MJ is strong but not THAT strong

[FishAreFriends2]

<a href=showthread.php?s=&postid=10604800#post10604800 target=_blank>Originally posted</a> by quangtam7
This guy selling them, I think $5 each.
http://www.youtube.com/watch?v=rxd3ABUBEd4

I'd like to buy some, so wheres this guy selling it? I checked ebay and cant find him. :confused: :confused: :confused: :confused:

[Atticus]

Wow I am sooo glad I got to read this thread today!!! I can't wait for the story of the MJ that shot through someone's tank and lodged itself in the wall... of the neighbor's house!!!!

Let use a little reason here people... These can push some water and yes they can dislodge themselves from the unit IF they are not build correctly. Once dislodged they lose all drive force and the drag of the water immeadiatly slows them. IF they come out they usually only pull out far enough to clear the magnet and fall straight to the bottom. MJ Mods don't kill people, crazy myths kill people!!!

[happyface888]

Look at what my bro showed me dh's hitchhiking stream mod is now available as a vid with instructions. :D reefvideos.com

[happyface888]

Hey DH need some help here, I am wondering if a mj 600 can run a dumas no. 3004, propeller 1-3/4" dia, 3/16" hole? If not can, is there something I can do to the prop? Like cut it down sand it down or something?

[Sandog Reefer]

Been following this thread for awhile. I tried to make a kit on my own but it didn't turn out like I wanted it too and I sorta gave-up on the idea of having one of these mods in my tank.

I was poking around online last weekend and found a place that was selling already made kits for only $29.99. They are using Octura props for the impellor. I called the store and after talking with the guy there ended up ordering one to test out.

I got the kit yesterday and I must say I am pretty impressed by the water flow from these things! I had all sorts of stuff kicking up off the rocks, it took some time for the water to clear up :) My tank is a 40 gallon and I have one of these in here right now. I don't have a lot of corals yet mostly fish do you guys think that having two of these would be too much flow?

O yeah the store I got it from is http://www.aquatictech.com and the company that makes the mods address is http://www.tritonaquatics.com.

So what do you guys think? Would two of these in my tank be too much?

[dhnguyen]

tritonaquatics.com

:lol: Good ole Lutz is at it again. I know that design from anywhere.

At least it looked like he finally gave up on the idea of trying to reinvent the actual propeller and opted to use an Octura 1435 instead. However that shroud is still way too narrow and restrictive to be very efficient.

[dhnguyen]

<a href=showthread.php?s=&postid=10625753#post10625753 target=_blank>Originally posted</a> by happyface888
Hey DH need some help here, I am wondering if a mj 600 can run a dumas no. 3004, propeller 1-3/4" dia, 3/16" hole? If not can, is there something I can do to the prop? Like cut it down sand it down or something?


Nope. You will have to trim that dumas 3004 down a lot to get it to spin properly on a MJ600

[happyface888]

How much and is their a site that tells me how to and where to trim?

[dhnguyen]

How much? Well... Until the MJ600 can spin that prop :)

The easiest way to do this would be to take the shroud off and keep the magnet centered with your hand and turn on the pump and run the propeller against some sandpaper. This will make sure your propeller is sanded down evenly and balanced.

[quangtam7]

<a href=showthread.php?s=&postid=10616602#post10616602 target=_blank>Originally posted</a> by FishAreFriends2
I'd like to buy some, so wheres this guy selling it? I checked ebay and cant find him. :confused: :confused: :confused: :confused:
He does not have an active auction now but you can send him an email via Utube or keep checking on Ebay.
Aquaglobe auction (http://cgi.ebay.com/5-Aquaglobes-similar-to-maxi-jet-aquaclear-rio-hydor_W0QQitemZ230160216248QQihZ013QQcategoryZ46312QQssPageNameZWDVWQQrdZ1QQcmdZViewItem).
The only extra parts for this mod are shroud and 1.25" Dumas prop. Although it is dc pump, you still need stopper to make it turn right direction, comsumes 2-3 watts (per Kill a Watt).
One of two pumps (http://www.youtube.com/watch?v=YALfrqn2v9M&watch_response) currently running in 37g tank

[JMBoehling]

Not sure if anyone has done this one yet but this Mod is working great in my reef. Next step is to make a shroud for it ;)

Jim's Sushi Mod :) (http://archive.reefcentral.com/forums/showthread.php?s=&threadid=1192120)

Later,

Jim

[quangtam7]

<a href=showthread.php?s=&postid=10634706#post10634706 target=_blank>Originally posted</a> by JMBoehling
Not sure if anyone has done this one yet but this Mod is working great in my reef. Next step is to make a shroud for it ;)

Jim's Sushi Mod :) (http://archive.reefcentral.com/forums/showthread.php?s=&threadid=1192120)

Later,

Jim
It has been done before, you have to go back several splits to find the posts. Check page 16 for newer design.

http://i3.photobucket.com/albums/y86/tamhoabao/jetstreamer2.jpg

[JMBoehling]

<a href=showthread.php?s=&postid=10635513#post10635513 target=_blank>Originally posted</a> by quangtam7
It has been done before, you have to go back several splits to find the posts. Check page 16 for newer design.

http://i3.photobucket.com/albums/y86/tamhoabao/jetstreamer2.jpg

Not exactly the same but close...

Thanks,

Jim

[quangtam7]

<a href=showthread.php?s=&postid=10636155#post10636155 target=_blank>Originally posted</a> by JMBoehling
Not exactly the same but close...

Thanks,

Jim
The mod on page 16 is not the same. Like I said, you have to search for it. The one pictured above has longer carbon fiber rod instead of stock rod to make the prop an inch farther from the pump.
http://i2.photobucket.com/albums/y12/quangtam7/bigshroud.jpg

The clear brace acts as stopper, also prevents the magnet/prop jumping out.
http://i2.photobucket.com/albums/y12/quangtam7/bigshroud3.jpg

[happyface888]

Hey quangtam7,thoes shrouds of yours are really nice mind sharing how you made them?

[Wett Hands]

Anyone have a DIY for an adjustable bracket or one that holds MJ1200 at a 45 degree angle?

[Wett Hands]

sorry for double post

[Wett Hands]

bump...

[happyface888]

Hey DH was wondering whats the reccomended length for the metal rod and the shroud?

[krikor]

When this craze started i followed the thread, but having not been into salt water yet and not having a MJ i really didn't pay much attention, but i just acquired two "broken" MJ mods. i took the two of them and made one that "works" i have to plug it in, take it half out of water, and spin the propeller to get it to run, when it runs it keeps running... but i dotn want to have to do that everytime the power goes out.

Any idea what could be wrong?

ill post pics of the broken broken one so you guys can see the "style" of Mod and what i can do to make the second one work and fix the first one.

[happyface888]

I need some help, I made a second one with a shorter shroud, I used the 1 1/2 abs shroud and I am getting a vortech effect. The water is being sucked in from the front and shot back out from the holes. Could this be because of the short shroud?

[gman107]

it sounds like its spinning the wrong way,stick something in there see if it will reverse its rotation.

[happyface888]

thanks for the help gman, i thought before that if they spun backward it would make the magnet dislodge itself.

[mudskiper]

Where can i get one of these kits at i looked at mjmods and they are always sold out?

[dhnguyen]

Have you guys seen this kit?

http://www.premiumaquatics.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=AF-SF1600&Category_Code=Maxijet

It looks very promising. The design looks well built and it is cheap to boot. I might just have to order a couple to test out.


D.

[krikor]

yeah ive been considering buying one, then i think, 20 with 7 shipping.... ugh... ha ha

[dhnguyen]

Will cost you more than that $7 in gas driving around hunting down parts to build one. Granted I could build about 10 mods for $20 but.... Considering for the folks who can't DIY or don't want to, this might be the way to go.

[krikor]

I love DIYing, i just need to know where to get the best parts now... i have one that was modded... just need to fix it.

[dhnguyen]

towerhobbies.com for carbon fiber rods, propellers, etc...

mcmaster.com for the stainless steel rods and SCH80 PVC pipes

LFS should have rigid tubing (3/16")

The rest should be found at your local hardware stores (Lowe, Home Depot, Ace, etc...)

[Frunkster]

May have to order myself one or 4 of those :), I will get back to the thread at some point D ;), think theres been another 1 or 2 million posts to mull through since I was last hear 7 thats just this thread lol.

Mine are still running & are quieter than the 6100 I have which I have also modded BTW ;).

[dhnguyen]

Long time no see Frunkster, I hope things are well on your side of the pond. I just ordered 2 of these myself to test out.

Spoke with Jeremy from PA about them and it appears that the shroud's inside diameter is a bit over 2 inches so plenty of room to switch out to a larger propeller if needed.

[Frunkster]

Any idea how they have approached the stopper?, & don't ask D, just had to strip down & do a rebuild single handed, never again lol

[dhnguyen]

Rebuilding your tank or your bike (I used to be a bike mechanic ages ago ya know)? And you did it in the nude (re: strip down) ??? :eek1: Good lord.


:lol: Glad to see you back Frunkster.

I did read that there is a stopper built in so we'll have to see how it is once the 2 I ordered arrive.

[thecichlidpleco]

so is there a best mod site to buy from, the mjmods.com seems to not want your business unless you are buying $1000 worth

[krikor]

the premium aquatics peice looks good and it comes assembled... another nice thing about...

[Snarkys]

<a href=showthread.php?s=&postid=10720166#post10720166 target=_blank>Originally posted</a> by thecichlidpleco
so is there a best mod site to buy from, the mjmods.com seems to not want your business unless you are buying $1000 worth

Sorry, I still have the site up for parts but we are shutting down www.mjmods.com . I don't have time to build them anymore and the new sure flow product looks like a good alternative already made product that can be sold cheaper : )

[ellisz]

Glad I got my props last week. I had been putting it off for a long time. I like the medium flow prop better than the high flow. Just seems to work better in my situation.

[Shannonsreef]

I've been running a moded 1200 for about a year now with a nitro hammer prop how much more flow can i get if i change to a dumas 3004 I believe I read?Thanks.

[pelochas]

<a href=showthread.php?s=&postid=10717801#post10717801 target=_blank>Originally posted</a> by dhnguyen
Have you guys seen this kit?

http://www.premiumaquatics.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=AF-SF1600&Category_Code=Maxijet

It looks very promising. The design looks well built and it is cheap to boot. I might just have to order a couple to test out.


D.

did you get to order them and tried them out? i want to see what your comments are. looking to get two of them for mj1200 on a 75 gal tank. i have 4 mj1200 so i dont know if i need to mod all 4 or just the 2 on the ends.

[dhnguyen]

mine are suppose to be here tomorrow so we'll see

[dhnguyen]

Ok my kits arrived and here are my thoughts good and bad on them.


Good:

- They seem well built and sturdy
- They look nice (finished product so to speak)
- They included the impeller magnet which I did not expect to find
- There is a stopper tab built in into the shroud to prevent reverse spinning.

Bad:

- The one piece propeller/shaft. Why reinvent the propeller? Why not make the shaft separate allowing the propeller to be removed and replaced? This would allow much greater versatility not to mention flow options for the user.

- The shaft is built specifically for a MJ400 or MJ600 impeller magnet only so if you have a MJ900 or MJ1200 magnet you want to use you won't be able to.

- The propeller blades are a tad too thick IMO and could cause more vibration and noise than would a typical RC boat propeller. Infact when my own modded MJ impeller magnet is used with an Octura 1435 propeller it becomes much smoother and quieter.

Overall I think it's a good product but could use a few design imrpovements as per the above.

The flow is decent (about 1500gph ish eq. to an Octura 1435 propeller) but nothing to go WOW about especially for those of you who are used to the MJ1200 highflow mods.

What I did was simply replace the kit's impeller magnet/shaft with my own modded MJ1200 impeller and a Dumas 3004 propeller and this thing is sweet. Much more flow than the stock kit and very simple to do.

[ostrow]

So, in the end, all you use from the kit is the shroud?

[dhnguyen]

<a href=showthread.php?s=&postid=10767690#post10767690 target=_blank>Originally posted</a> by ostrow
So, in the end, all you use from the kit is the shroud?


The shroud and the swivel mount (which IMO is very well built and nice BTW...)

Don't get me wrong for medium flow (1500gph ish or so), this mod would be perfect

I just prefer more flow that the kit can provide.

I think the shroud and the swivel mount alone is worth the $20 they are charging IMO. The shroud as everyone who have done this DIY knows is the most difficult part of it all and I think they have done a very professional job designing it in this kit.

[cweder]

dhnguyen,

I just bought 2 sure flow mods and 2 dumas props for my 2 mj-1200's. What else do I need and how do I do it to get these maxed.

[dhnguyen]

cweder

Since you want to use the Dumas 3004 props, you will need to mod your MJ1200 impeller magnets. The kits' magnets will not be able to spin the large Dumas props.

To mod your MJ1200 impellers you will also need some 3/16" rigid airline tubing, that black vinyl airline that came with the original Maxijet.

- Cut the rigid tube to be about 1.125" or so (or just enough to match the length of the kit's impeller and shaft/prop assembly)

- Glue the Dumas prop onto the end of the rigid tube.

- Cut about 3/4" section from the black vinyl tube and use that to hold the rigid tube and MJ1200 magnet together. It may take some elbow grease to get everything on and fit tightly.

That's it really then just take one of the black/red end cap off the kit's impeller shaft and replace the impeller magnet with your modded MJ1200 magnet. You're done.

[cweder]

So I dont have to buy anything else...new magnets or anything? How much of an improvement over the sure flow 1600 can I expect?

I may as well ask for a pic or two if you have them, that would really make this easy.

Thanks!

[Harold Edwards]

did everyone see this thread I posted.

http://archive.reefcentral.com/forums/showthread.php?s=&threadid=1207745

[dhnguyen]

<a href=showthread.php?s=&postid=10774894#post10774894 target=_blank>Originally posted</a> by cweder
So I dont have to buy anything else...new magnets or anything? How much of an improvement over the sure flow 1600 can I expect?

I may as well ask for a pic or two if you have them, that would really make this easy.

Thanks!


Check out reefvideos.com under the DIY Maxi-Stream for how to mod the impeller. The only difference is that you should use the black airline the came with the original Maxijet instead of the clear airline in the vid. The black tube is much tougher and won't fail like the clear airline.

My camera's batteries are being recharged but if I get a chance later I'll snap a pic of the modded impeller.

Just make sure your modded MJ1200 impeller is the same length as the one form the kit and you are set.

[dhnguyen]

I moved my tank over to the opposite of the room to get ready for the new 125g setup. While at it I also rearranged the rockwork and made a quick vid of the MJ mod in my tank.

Not bad for only one MJ1200 :)

http://s170.photobucket.com/albums/u260/dhnguyen/?action=view&current=Untitled2-1.flv

[Harold Edwards]

Here is the mj 900 I just made this week end. what do you thank?<img src="http://i84.photobucket.com/albums/k13/ehgemus/100_0079.jpg" border="0"/> <img src="http://i84.photobucket.com/albums/k13/ehgemus/100_0082.jpg" border="0"/>

[dhnguyen]

Looks good, very clean cuts too. Only thing I could suggest is more inlet slots so that you can increase the flow even further.

[Harold Edwards]

what do i do to make it start in the right direction?

I tried it in my 46g and I thought I was going to move the rocks with this thing. I going to save it for my 75g when I get it going.

[dhnguyen]

You need to put in a stopper to make the prop spins right everytime.


Yeah I HAVE actually moved rocks with the MJ mod in my tank. IF your rock work isn't solid, it could cause an avalanche (speaking from experience here)

[ellisz]

Will the stopper hitting the prop eventually cause the prop to come undone from the shaft? I have had a few but was not sure if I just needed more super glue or if this was common?

[krikor]

Yeah im curious about the stopper too... have any pictures of where they go?

granted i didnt go though this entire thread... but i didnt see any good pictures showing the stoppers.

Thanks!

[dhnguyen]

I have never had a propeller come undoen from the shaft. Could be the glue you are using?

A stopper is nothing more than a tab or a pice of tubing of some sort placed inside the shroud just infront of the propeller (1/8" away or so) so that when the prop spins backward, it will shoot out and hit the stopper, stop spinning, get sucked back inside by the magnet and correct its spin. This all happen very quickly within a 1 second or 2.



D.

[krikor]

Oh that seems simple enough it doesnt matter where it is its just inside there anywich way. I have an issue finding the 2.5-2" adaptor they used on the AC802 Mod.

Depot doesnthave anything thats 2.5"

[bleedingthought]

<a href=showthread.php?s=&postid=10767518#post10767518 target=_blank>Originally posted</a> by dhnguyen
Ok my kits arrived and here are my thoughts good and bad on them.


Good:

- They seem well built and sturdy
- They look nice (finished product so to speak)
- They included the impeller magnet which I did not expect to find
- There is a stopper tab built in into the shroud to prevent reverse spinning.

Bad:

- The one piece propeller/shaft. Why reinvent the propeller? Why not make the shaft separate allowing the propeller to be removed and replaced? This would allow much greater versatility not to mention flow options for the user.

- The shaft is built specifically for a MJ400 or MJ600 impeller magnet only so if you have a MJ900 or MJ1200 magnet you want to use you won't be able to.

- The propeller blades are a tad too thick IMO and could cause more vibration and noise than would a typical RC boat propeller. Infact when my own modded MJ impeller magnet is used with an Octura 1435 propeller it becomes much smoother and quieter.

Overall I think it's a good product but could use a few design imrpovements as per the above.

The flow is decent (about 1500gph ish eq. to an Octura 1435 propeller) but nothing to go WOW about especially for those of you who are used to the MJ1200 highflow mods.

What I did was simply replace the kit's impeller magnet/shaft with my own modded MJ1200 impeller and a Dumas 3004 propeller and this thing is sweet. Much more flow than the stock kit and very simple to do.
D, if you buy that kit for a MJ1200, can you just use the original impeller?

[bleedingthought]

P.S. On the premium Aquatics page, it says that it can be used with all four MJs: http://www.premiumaquatics.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=AF-SF1600&Category_Code=Maxijet

[dhnguyen]

Again...

- The shaft is built specifically for a MJ400 or MJ600 impeller magnet only so if you have a MJ900 or MJ1200 magnet you want to use you won't be able to.


You can use the magnet that came with the kit in the MJ900 or MJ1200 pumps but don't expect 2000+ gph flow from it unless you were to use a MJ1200 magnet as well. And as I stated previously the shaft/prop assembly that comes with the kit will not fit a MJ900 or MJ1200 magnet.

[bleedingthought]

<a href=showthread.php?s=&postid=10813662#post10813662 target=_blank>Originally posted</a> by dhnguyen
Again...

- The shaft is built specifically for a MJ400 or MJ600 impeller magnet only so if you have a MJ900 or MJ1200 magnet you want to use you won't be able to.


You can use the magnet that came with the kit in the MJ900 or MJ1200 pumps but don't expect 2000+ gph flow from it unless you were to use a MJ1200 magnet as well. And as I stated previously the shaft/prop assembly that comes with the kit will not fit a MJ900 or MJ1200 magnet.
Ah, I see.

Their site, http://www.algaefree.com/sure_flow.html , advertises up to 1600 GPH from the kit. Do you think that sounds about right on the MJ1200 with their magnet?

[dhnguyen]

yeah it about right.

[bleedingthought]

<a href=showthread.php?s=&postid=10814146#post10814146 target=_blank>Originally posted</a> by dhnguyen
yeah it about right.
Thank you, sir! :)

[wmfsoll2]

very interesting work. very long thread. alot of good info though.

Thanx, Bill.

[johnl69]

does it matter whether you use a LH or RH prop for these mods?

[dhnguyen]

Not really. It matters though if you're modding an AquaClear powerhead instead of a MJ since those pumps have more of a tendency to spin in one direction.

[ostrow]

Say, what's the best way to cut carbon fiber rod? The last time I tried I mangled it.

[dhnguyen]

hack saw or a dremel cutoff wheel

[emmanuel]

I moded my mj 1200 after coming across the very first thread (not realizing there were 100000 pages ) I got excited and ordered the parts from the very first post and used the two small white prop. it works but it does not have as much flow as a mj1200 with the output nozle cut off . I guess the props I used are not the corect ones but i am so dizzy from going randomly thru all the post I have no clue anymore .
for the most flow what prop should I use and how far from the powerhead body should the prop be .
Also the 1 1/2 inch pvc pipe doesnt fit my mj1200 I had to do some grinding on the inside of the pipe and there is not enough material on the pipe to clip on the 2 tabs of the powerhead
Am I missing something??

[RONCGIZMO]

ok, thanks for keeping me up 3 nights in a row...lol
after reading this thing I bought 2 MJ600's and 1 1200

the 1200, hehehe I can't even use it in my tank, forget about waves
I had a tsunami in my tank hehehe! anyway, thanks to all the posts here I don't think it took more then 30 min for all 3 mods (once I found the parts)

Thanks guys, great team work!

[Black71gp]

i just got a MJmod kit from another reefer... he said it was the high flow kit.. but it came with a brown prop. an octura 1435 last time i ordered the hi flow kits they were white props.. what prop do i need for the best flow out of a 1200 with the mjmod kit?

[dhnguyen]

the white Dumas 3004 prop will get ya the highest flow

[Black71gp]

thats what i thought.. now to order another one of those...what about the octura 1440???

[Snarkys]

i found the octuras to be a waste of time . They worked about half the time but you better build it perfect and it may stop working months down the road. The Dumas really is the prop of choice : )

[Snarkys]

<a href=showthread.php?s=&postid=10814114#post10814114 target=_blank>Originally posted</a> by bleedingthought
Ah, I see.

Their site, http://www.algaefree.com/sure_flow.html , advertises up to 1600 GPH from the kit. Do you think that sounds about right on the MJ1200 with their magnet?

algae free changed their kit so it now includes the their original prop as well as the dumas 3004 to provide different flow rates. I would guess that that it would do as much as 2400 GPH with the dumas prop.

It also now includes a new bracket to attach the MJ to the original hanging or suction cup brackets.

The optional higher flow rates and a way to attach the mod to your tank without buying expensive magnet holders makes this much more attractive in my eyes. Doubly so if you already own the MJ. It is significantly smaller, cheaper and more flow than a hydor 4.