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#101
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it hasn't been so far!
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- Danny Go SunDevils...there's always next year! |
#102
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any updates to how the AC's are doing? Did you find a solution?
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#103
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not yet, I haven't been working on it though.. probably will here shortly. I'm waiting for the FedEx guy/gal to get here so i want to make sure I can hear the door bell. I'm pretty sure I have to reduce the height of the impeller well...almost 1 1/2" is too big.
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- Danny Go SunDevils...there's always next year! |
#104
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Whats coming from fed ex today?
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#105
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snails, crabs, algae eating blennie.. I was hoping my rod's onyx were coming via fedex as well, but they may be coming ups which doesn't get here until late.
I don't know about this AC mod now.. I can only get 8-10scfh out of it. I only have about 2g of water in a bucket though so it's nothing like the 24-36" Hahn had mentioned testing his. I put 3 layers of enkamat on it, used 1" and 3/4" inlets/outlets, different kinds of venturis... there's one more venturi I'd like to try, I just don't have the urge to do it right this second, looks like the picture though, supposedly you can get more air pull if you use multiple sources of air as opposed to one giant source, so drilling 4-8 holes in the piece of 1/2" piping in the center, it apparently should work better.. we'll see though.
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- Danny Go SunDevils...there's always next year! |
#106
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Danny, Have you experimented with covering some of the water intake with your hand to see if that increases air any?
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Jeff |
#107
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No i haven't. I thought that 1/2" restriction was enough already, but I can try it out. wouldn't adding more restriction to the water cause more air to be sucked in and more choking? or am i wrong in theory here?
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- Danny Go SunDevils...there's always next year! |
#108
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as i put my finger over the intake and all it does is drop from 8 to 0 slowly, so apparently that's not it.
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- Danny Go SunDevils...there's always next year! |
#109
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maybe try the opposite, enlarge the 1/2" reducer and see if that helps. It does sound like ther is too much air...but that shouldn't be the case with the new volute, so maybe it's not enough water thats the problem. Have you heard from Jon yet?
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Jeff |
#110
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no I haven't. But according to his mod, he used 3/4" on both inlet/outlet, used 3/8 airline (not sure if it was 3/8 id, or od) and didn't have a problem. I'm wondering how the new set up is done that he put pictures up of on the other thread. He had a T on it. so I'm wondering if pulling the airline back further allowing more water to get sucked in will allow more air? His initial set up showed that his airline "venturi" was in the 45 elbow that he slipped on what appeared to be a 1" section of possibly 3/4" pipe.
Here's some interesting info that liveforphysics sent me when I pm'ed him about venturis, he's some kind of hydro engineer or something: Quote:
Quote:
Sorry, this got really long, but is very interesting. it's obvious that some pumps will only be able to handle so much air before choking, but this seems logical on how to get more air in. The problem it seems that is brought up with choking is that the air bubbles coming in are way too large and causing the pump to stop and start, if the air was brought in by a bunch of tiny bubbles, I think there wouldn't be a chance for the pump to stall, but would chop them up... what do you think Jeff? did you catch all that
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- Danny Go SunDevils...there's always next year! |
#111
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man my head hurts from reading that stuff, I pretty much don't understand whats going on lol. Guess I'm not a DIYing custom guy thats pretty dam hard for me to understand.
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#112
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lol... yeah I had to read it a couple of times. Just imagine this drawing, but instead of using 3 pieces of differing pvc sizes, using a 1" piece stretched to do the same thing:
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- Danny Go SunDevils...there's always next year! |
#113
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I'll let whoever chime in on the design, so hows the skimmer going now? I haven't seen any updates to what its pulling? |
#114
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the neck gets nastier faster now that's for sure. I'm still working on getting that ac70 going.. I think getting more air in the neck will allow better skim. It's not showing much, probably still in the 1/3cup range, but it just looks nasty. I just added some more clean up crew and another fish.. so now I have 5 in my 45g , seems like a lot to me, so I'm glad I have the big guy back there.. workin OT!
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- Danny Go SunDevils...there's always next year! |
#115
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I have 10 fish in a 50g and if I recall happy had like 7 x.x NOW SELL ME YOUR BALCO
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#116
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holy buckets! 10 fish !!! I guess you really do need this thing. Are your fish small or what?
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- Danny Go SunDevils...there's always next year! |
#117
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that makes a lot of sense danny! You'll not want as small as 1/4"ID i'm sure...but you'll want to experiment with what ID XSA will work best on an aspirating venturi. The 1/4" XSA is what is typically used in a venturi that will be driven by a pressure pump, so the physics are the same, but the implementation is a little different
What he said about turbulence from steped down pipes makes sense...I had never really thought about just heating and stretching It's really about finding that nice balance between water and air!
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Jeff |
#118
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so how are things going now?
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#119
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You can make that venturi easily. I've done it quite a few times. Take a piece of 3/4" pvc or 1" pvc and take a metal hose clamp and boil it for a few minutes, take it out and put the squeeze on the metal hose clamp, it'll squeeze a bit, then keep doing that until you get to 1/2". Its a smooth transition. I'm actually pondering over a new venturi that i think will be better than any of these but i need to put it into play before i tell people about it.
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There's no such thing as a normal reef, there's just reef |
#120
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so secretive! I might try it this weekend if I have nothing going on. I'm going to take it easy since I caught this god aweful cold/flu thing the other day. But I'd like to try the manifold version to see how it works.
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- Danny Go SunDevils...there's always next year! |
#121
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Luke has a picture of that venturi, but I don't know where it went. Its lost somewhere in the octopus hob thread x.x and thats going to be a pain to search for.
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#122
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i remember seeing that one. I'd like to try stretching a piece, I think that'd have interesting results.
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- Danny Go SunDevils...there's always next year! |
#123
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Having a custom venturi instead of the normal one seems to work better,. I am wondering how come your not using 1/4 air tube instead?
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#124
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1/4" airline instead of what? I'm using 1/4" ID airline while testing this stuff if that's what you're asking.
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- Danny Go SunDevils...there's always next year! |
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