New pattern CO2 diffusor - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 03-10-2009, 02:07 AM Thread Starter
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New pattern CO2 diffusor


This is my new CO2 diffusor. It is actually easier to make than the old one (which you can see if you look at pictures of my 120 gallon). It is just a random-length piece of 1 inch PVC (Much more fun if it is clear, but regular white will do the same thing), an end cap for same, and a Rena-Flow pump. I drilled the end cap to accept a nipple, which I took from an old air stone. The pump comes with a little outflow pipe. I chopped a hole in the side of the PVC with a chop-saw, same width as the outflow pipe, then buried the outflow pipe in the PVC so that the flow of the water is perpendicular to the pipe and leads into one side, not the center. Everything is put together with Marine Goop. You need something that is gap filling since chopping holes in the sides of PVC with a 10 inch saw blade is not a surgical operation. At least, not when I do it. The flow in the pipe, as illustrated above, is then circular. Because the water takes its sweet time falling out of the pipe, this thing basically never burps, so it is 100% efficient. It can take a lot of bubbles per second.

Thanks,
Rod


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post #2 of 4 (permalink) Old 03-10-2009, 05:45 AM
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I would so copy your idea if it were broken down into dummy steps. Just looking at the bubbles tells me that your diffuser works.
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post #3 of 4 (permalink) Old 03-10-2009, 12:32 PM
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Basically, its a powered reactor. Nice little DIY. Curious to see how good it dissolves.

You could have put the inflow of the power head into the PVC on a slight angle and it would have created a vortex and dissolved the gas more effectively and also increased the contact area.


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post #4 of 4 (permalink) Old 03-10-2009, 12:38 PM
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It looks like it is a vortex in the pipe, see the 'cone' extending down the pipe?
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Originally Posted by houstonhobby View Post
I chopped a hole in the side of the PVC with a chop-saw, same width as the outflow pipe, then buried the outflow pipe in the PVC so that the flow of the water is perpendicular to the pipe and leads into one side, not the center.

Sean

Aquascape? I'm a crypt farmer.

It's a fine line between fishing and standing on the shore looking like an idiot.

That IS an aquascape, it's titled "The Vacant Lot".
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