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post #1 of 4 (permalink) Old 05-18-2017, 02:13 PM Thread Starter
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diy co2

Thinking about buiding a diy co2 system for my tank. The idea I have is to use the normal 2 liter co2 system but put it in a 5 gallon bucket with a air pump inside.
the idea is that when the lights are on the airpump would run and add co2.
and when the lights were off the air pump would be off and no co2 added. But the co2 would build up in the bucket.
not sure if this would work anyone ever tried this??
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post #2 of 4 (permalink) Old 05-18-2017, 03:31 PM
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Thinking about buiding a diy co2 system for my tank. The idea I have is to use the normal 2 liter co2 system but put it in a 5 gallon bucket with a air pump inside.

the idea is that when the lights are on the airpump would run and add co2.

and when the lights were off the air pump would be off and no co2 added. But the co2 would build up in the bucket.

not sure if this would work anyone ever tried this??


Sounds interesting. You would have to have a bucket that is sealed completely and able to handle the pressure of the co2. Not sure how that would work...


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post #3 of 4 (permalink) Old 05-18-2017, 03:42 PM
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Originally Posted by ?..? View Post
Thinking about buiding a diy co2 system for my tank. The idea I have is to use the normal 2 liter co2 system but put it in a 5 gallon bucket with a air pump inside.
the idea is that when the lights are on the airpump would run and add co2.
and when the lights were off the air pump would be off and no co2 added. But the co2 would build up in the bucket.
not sure if this would work anyone ever tried this??
Interesting idea. You would need a way to really dial down the air pump because they move a lot of air. The other concern is air exchange inside the bucket and keeping a consistent level of CO2. When you're just dealing with the 2 liter bottles with a hose going directly into your tank to a diffuser, you're getting CO2 as the baking soda and citric acid react (or yeast if you're going that route). But in the bucket, you're counting on a saturation level in the air space in the bucket that will probably not hold steady. Maintaining good, steady levels of CO2 we know is very important and doing that with DIY is a challenge by itself, you're adding another element though that I think will make it even more challenging.

Will the air pump need air exchange to function correctly? I'm thinking it would have to be able to draw air in because the DIY co2 may not off enough gas to keep the bucket from compressing while the air pump is running. This could maybe strain the air pump, bring it to an early grave? I'm really not sure on this part.

Edit: Also, why attempt this vs just shutting the valve on the CO2 overnight? 2 Litre bottles can handle some pretty serious pressure. If you're worried about them popping, you could do what I did and stick them inside a 5 gallon bucket, drill a hole in the lid for the hose, put the needle valve outside the bucket and just shut it off at night. If they blow with the pressure, you should pretty well contain the mess...I hope. Haha.
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post #4 of 4 (permalink) Old 05-19-2017, 10:36 AM Thread Starter
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Maybe a check valve to allow a small amount of air in but not let the co2 out would prolong the life of of the smallest air pump I can find.
I drive a truck for a liiving and the kids keep the fish fed but not sure they would keep up with turning on and off the co2.
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