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Old 08-05-2009, 04:11 PM   #11 (permalink)
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Default Re: Needle wheel pump

yeah I made myself thirsty orlando..

I don't know who came up with the idea of using the pump off a protein skimmer to mix CO2 into our tanks but bless 'em!
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Old 08-05-2009, 04:33 PM   #12 (permalink)
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Default Re: Needle wheel pump

This is the first pump I made to fit under my 120G tank. It was built on a closed loop..


This is the thread I started in October of 08! On ole PTF...

I'm not sure who thought of the idea, but I love it and I wont turn back.
Except for the smaller tanks

Cheers!
Orlando

Last edited by orlando; 08-05-2009 at 05:44 PM..
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Old 08-05-2009, 05:04 PM   #13 (permalink)
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Default Re: Needle wheel pump

I remember seeing wasserpest's suggestion to put an AC30 powerhead ontop of a sponge, running CO2 into the impeller. That was around '06, and I remember seeing people melting holes in the impeller blades and also cutting them to increase fractioning not too long after that. I cant remember where I saw the OTP series needlewheels in action, maybe the youtube video. But I got one ASAP and now I have 3 running. I use smaller powerheads on smaller tanks, some with modified impellers.

one thing I haven't tried yet is stainless mesh for chopping up the bubbles. How about you Orlando? I'm a bit worried about it becoming clogged with debris but maybe thats not an issue. I have a stock OTP-1000 that has run 24/7 for 1.5 years now and hasn't been cleaned yet. I don't prefilter the intake on it. So for a long term solution I think the needlewheel misting is pretty stable.
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Old 08-05-2009, 05:14 PM   #14 (permalink)
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Default Re: Needle wheel pump

That youtube video is what got me started! Lol!

I have seen people use those mesh mods, have you seen them? It a little kit with some funky mesh and I think zip ties?
I know the reef folks use them all the time. Personally I dont really see a need for them with our tanks.
One thing I was thinking of is building a PVC fitting with one of Hydor ceramic tubes inside afixed some how and have co2 mist going into the pump.
What do you think?
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Old 08-05-2009, 05:22 PM   #15 (permalink)
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Default Re: Needle wheel pump

I found it!
http://www.meshmod.net/
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Old 08-05-2009, 05:41 PM   #16 (permalink)
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Default Re: Needle wheel pump

so you gonna try it?
I'd be willing to give it a shot. I think the stock venturi I have needs to go also.

heres a quick pic of an unmodified octopus impeller, to show what needlewheel looks like :

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Old 08-05-2009, 05:45 PM   #17 (permalink)
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Default Re: Needle wheel pump

I think I might do it this week.. I will for sure let you know how bad I screw it up

Better get a few extra impellers for when I do
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Old 08-05-2009, 05:56 PM   #18 (permalink)
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Default Re: Needle wheel pump

I found this thread on RC that is specific to my octopus pumps, looks like the impeller mod is reversible since the mesh is just zip tied to the blades and trimmed. Let me know how it goes. I think I'll order some of the enkamat mesh this week.

glad this thread got started..just a little nudge to get me to go a bit further with the needlewheel method.
I monitor power draw on my pumps so I'll be able to see what happens there also.

edit : well I read the thread(s) closer instead of just a skim, and its not reversible (doh!)
you cut off the top row of impeller blades. I do have a spare impeller but I still hope I dont screw up when I add the mesh.

Last edited by ashappard; 08-06-2009 at 06:33 PM.. Reason: wrong about impeller mod being reversible
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Old 08-05-2009, 06:28 PM   #19 (permalink)
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Default Re: Needle wheel pump

Now I must describe this phenomenon to people using Guiness as a visual aid. Hopefully I bump into slow learners
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Old 08-05-2009, 06:48 PM   #20 (permalink)
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Default Re: Needle wheel pump

Cool, I may have to try this out. Any pumps that work better then others for this? Do you carry them Orlando?
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