DIY C02 reactor or diffuser? - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 26 Old 09-03-2009, 11:02 PM
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Question Co2 Generator, Filter and Diffuser

I just setup two 2 liter bottles (sugar & yeast), ran into a 20oz bottle w/ gravel (filter bottle), ran thru volcano extended tube w/ hollow flex bubble cord inside 20oz bottle (suction cuped to wall) w/ house fountain pump (suction cuped to wall) ran into bottle w/ Co2. Anything else? Good setup?
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post #22 of 26 Old 09-03-2009, 11:25 PM
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I took a flexible air cord, pullled the hook up off removed inside flex cord, super glued hook up back on, attached it to Co2 hose (from two 2 liters) ran it into a plastic bottle w/ bottom cut off, took the flex cord (from inside air cord) and wrapped a suction cup to the bottle and attached to inside wall. Then I took a pump from a house fountain and ran it from inside wall into bottom of 20oz bottle and it seems to be working well.
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post #23 of 26 Old 09-04-2009, 10:25 AM
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GOnna be trying a diy co2 soon my self
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post #24 of 26 Old 02-14-2014, 09:25 PM
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kevin g - just say c02 in essence is carbonic acid, so it is slowly dissolving the filter parts. you are wrong. if you dont believe me google it.
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post #25 of 26 Old 02-19-2014, 04:23 PM
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Originally Posted by Blaxicanlatino View Post
I built a DIY C02 generator (with the yeast and 2liter coke bottle and stuff) and i hooked it up to an airstone and placed the airstone under the filter intake (so the bubbles would get chopped up by the filter propeller) but I noticed that the airstone is getting a clear film around it. SO i want to remove the airstone and find another way to mix the the co2 better into the tank. How do you make a cheap diffuser/reactor? thanks you
Believe it or not, plain cotton makes a great diffuser. I took a small filter media bag and put a small cotton ball in it from an old medicine bottle (about the diameter of a quarter.) Next, I ran the airline to the middle of the cotton ball. Secured it with a small rock on the floor of my tank. This produced very fine bubbles, and very LOW pressure is required for a steady flow unlike ceramic and other diffusers. Perhaps best of all, the cotton is easy to replace and costs nothing since we all have some lying around the house somewhere.
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post #26 of 26 Old 02-19-2014, 04:33 PM
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Remember that "surface tension" (or movement) is a key factor in losing CO2 to the atmosphere. That's why I like internal filters vs. outside filters for growing plants. My tanks have very low surface tension (you do need some movement but not much.)
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