return pump for 180g-200g

[Kernel Panic]

jond-
I run a Tarpon on my basement sump for a 125. The same pump would probably be good for your size tank under the stand. It is large tho 18"x8" footprint. The snapper is smaller and may work well for your application.

[jond]

Thanks. Does anyone know how much you can restrict a Dart by valving it down? It would be nice to have the flexibility, but I am not sure if backing it down to 1200 gph is too extreme.

[jond]

bump

[rigleautomotive]

look at blue line hd 40x,gph,poewr consumption and reliability is hard to beat for a 140 dollars.i use them on all my systems and i love them

[benf]

When i asked Sequence about valving down they said no problem...wont hurt a thing.

[rigleautomotive]

except your wallet for wasted energy.i try to go with the least operating cost ip possible

[benf]

they publish their output vs energy curves...they will show you if its where you want to be or not

[jond]

Thanks. I will check it out

[gusmanda]

what if someone uses a small return pump and hence not much flow in the sump, but keeps the main tank strongly circulated. Is this good or bad?

[rigleautomotive]

there is a school of thought that supports low flo sumps with very high efficiency protein skimming and macro algae usually.processing nutrients as opposed to removing nutrients.i personally like to match the skimmer to the flow through the sump.

[ShadowViper]

Using this chart to figure out the darts performance per watt
http://www.marinedepot.com/aquarium_...nformation.asp
you can see that at about 1200gph on the dart your using about 145 watts, this is like 8 gallons/watt VS the blueline hd40 that is rated at 790gph at 120 watts you get about 6 gallons/watt.

The dart looks to be more effecient then the bluelines plus you have the option to increase flow with the Dart. The most watts you will see out of a Dart is roughly 160 watts at around 2000 gph this is about 12 galloons per watt so even though the power has increased, the effeciency also increased.

The blueline 40 will also loose flow due to head preasure.

I am the middle of setting up my 180 and just found out tonight my mag 24 which i had planned on using (had pump for a few years) broke the impleller shaft and punctioned inside the magnetic housing while in my live rock bin, so I am also looking for a good effeicient pump and the dart or even the snapper both look to be the best bet.

[jond]

Good info...thanks.

[rigleautomotive]

the blue line i was talking about is the hd40x which is 1200 gph i believe or more.it is more efficient than a dart i also believe.wisper quiet and cheap.used them 5 years without failure on 3 different systems.IMO its the pump i would use

[rigleautomotive]

i checked the specs,its 1270 gph at 130 watts.13 ft of head pressure.also i have personally tested 4 of them and they work.

[ShadowViper]

Ok my mistake didnt notice the x. The HDx is rated at 1270 gph @ 0ft with 130 watts, this would put it just under 13 gallons/watt. Note though at 6ft return the pump pushes only 900 gph, so if 1000+ gph flow is what your looking for this pump still won't compete but it is effecient (needs to be an X line though).

here is a site that has a graph of their flow rates and watt used and such for the various blueline pumps.

http://www.saltycritter.com/pumps/bl...orld-pumps.htm

One thing with the x lines is they lose alot of flow with more head preasure.

A snapper can do a little more then 1300 gph at about 8 ft of head preasure using only around 100 watts or 13 gallons per watt at that flow rate. @ 0ft of head preasure the snapper runs at 2700gph at 90 watts, thats 30 gallons/watt. MAX wattage listed for the snapper is 110w.

So even throtteled down to the desired flow flow rate the snapper still performs the same 40HD-x(running with 0ft headpreasure) with effeciency and is able to perform the flow rate on at the typical headpreasure you will see on a return system(the HD40X only does under 900 gph at 8ft of headpreasure).

Sequence home page that has some graphs.
http://www.reeflopumps.com/flowbiasedpumps.html

Using the first link you can find prices on both the 40HDX and snapper the snapper is only a 30 dollars more. For the little extra you have the option of future expansion of your plumbing plus you don't have to pay extra costs of electricity with the snapper.

[hulley]

I'm using a blueline 40HD-X as my return and 2 Tunze 6060s for circulation in my 180. I'm only wanting the 3-5 times turn over display to sump so the skimmer can do its job. Just a thought. Also, keeps micro bubbles/water noise down. BTW the tank is not up and running yet! but the equipment is on its way! Lots of research and testing with current tank.

[jond]

Thanks for the info ShadowViper...I had not previously looked into the snapper.