CO2 bubble lift - The Planted Tank Forum

 
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post #1 of 7 (permalink) Old 02-14-2014, 04:33 AM Thread Starter
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CO2 bubble lift

Want to keep the amount of equipment need to run a low tech system out of the tank and so was wondering if anyone out there uses the bubbles from an in-tank CO2 ceramic diffuser to create water movement in a small tank. I remember from older technology the use of air lift tubes on under gravel filters to move water thru the gravel. Has anybody used this principle to create a gentle circulation pattern and move dissolved CO2 throughout the tank? I know that DIY CO2 will probably not be able to provide the pressure needed to run a ceramic diffuser so, will probably have to go with a paintball set-up. Anyone with this kind of pressurized CO2 system?
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post #2 of 7 (permalink) Old 02-17-2014, 03:37 PM Thread Starter
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Nobody has done this? Maybe I should post this thread in the Equipment forum?
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post #3 of 7 (permalink) Old 02-17-2014, 03:42 PM
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Air lifts need relatively large bubbles, so the move fast up through the water. CO2 diffusing into the water requires the smallest possible bubbles, so they move slowly up in the water, and have a very high surface to volume ratio. The dual use of CO2 would do neither job very well.

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post #4 of 7 (permalink) Old 02-17-2014, 04:34 PM
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Quote:
Originally Posted by Hoppy View Post
Air lifts need relatively large bubbles, so the move fast up through the water. CO2 diffusing into the water requires the smallest possible bubbles, so they move slowly up in the water, and have a very high surface to volume ratio. The dual use of CO2 would do neither job very well.

Thanks Hoppy. Didn't really want to move large volumes of water, just want to distribute CO2 to the other side of a Mini S tank (approx 12" wide so, 13-14" dia.). In your expert opinion, do you think that an in-tank ceramic diffuser would provide the circulation needed to supply sufficient CO2 to HC on the other side of this small tank? Mahalo & really appreciate your help.


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post #5 of 7 (permalink) Old 02-17-2014, 05:28 PM
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Oops

Sorry AquaJedi for hijacking your thread. I'm actually thinking of doing this and was waiting for a response. When I finally flood my tank, I'll let you know how it goes. Your from HI too!

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post #6 of 7 (permalink) Old 02-17-2014, 07:13 PM Thread Starter
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It's cool BeastMaster, no harm, no foul. Better your response than none at all. Good luck with your tank. Also, thank you Hoppy for chiming in, would love to hear your comments on this topic.
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post #7 of 7 (permalink) Old 02-17-2014, 09:35 PM
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From what I experience with any of my ceramic diffusers - either glass, steel, or acrylic, the bubbles would just slowly drift to the surface with no current in the tank. I understand what you're trying to achieve, but using co2 diffusion to circulate will not work as effectively as compared to air pumps.
In my 12x12" cube I run a canister just to move the co2, so I'd strongly recommend a small pump atleast.
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