How to make co2 reactor/difusser out of canister filter? - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 01-11-2011, 11:21 AM Thread Starter
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How to make co2 reactor/difusser out of canister filter?

I found two canister filters next to the trash to be disposed of and both work ok. I don't know what to do with them except for making them into something else. I might use one along side my sunsun and try a convert the other into a reactor/diffuser. Could someone point me to the thread that talks about this subject if it exist? I would like better CO2 diffusion without buying specialized items because of shipping time and price. I live in Japan as part of my military tour so buying off base can be a little hard when unable to describe what I'm looking for.
The on the left is the Eheim Ecco 2236 and the one to the right is a Tetratec ex600. Which is better suited to be converted into a CO2 reactor/diffuser?

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post #2 of 3 (permalink) Old 01-14-2011, 04:28 PM
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I know that you can make a reactor out of PVC piping and fittings(eg. search rex grigg reactor). But in my opinion, it is a waste to use a canister filter just as a reactor.

The idea of a reactor is create more time for co2 to be dissolve before leaving a container. Therefore, answer to your question is that you can try just feeding co2 into the inlet of your canister. If you don't see any visible bubble from the outflow, then you have yourself a reactor.

Forgot to mention: If you feed the co2 straight to your canister, your canister will have a much shorter life.
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post #3 of 3 (permalink) Old 01-14-2011, 05:21 PM
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Since the Eheim exits water from the top (it looks like they both do), you need something in the canister to slow the bubbles down and maybe break them up. I'd suggest putting the media baskets in the Eheim but NOT the blue pad. That way you get surface area but very little resistance to flow. Feed CO2 into the intake in the tank so it has even more time to dissolve before getting to the impeller. Should work great.

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