Aqua Euro

Aqua Euro

Help with a homemade co2 generator?

I recently just built a homeade co2 generator with yeast and sugar and about a 2liter apple juice bottle. I was wondering if I can stick a Aqua Euro Glass CO2 Diffuser at the end of airtube that enters the aquarium or would it be better to just have the airtube by itself in the tank?

You have to, otherwise practically all that CO2 will be wasted by rising straight to the surface. A diffuser that uses a ceramic plate works best in my experience, another good type are those closed units where the CO2 has no escape at all and is churned up by the water entering the diffuser from the filter. If you are using the ceramic diffuser or an airstone (use those that produce as fine bubbles as possible), position it below your filter outflow so that the bubbles are swept across your tank instead of reaching the surface. Also make sure your water surface is as little agitated as possible to reduce CO2 loss.

With CO2 injection, do note the effects if you have fish. CO2 can make pH drop rather a lot especially if your tank has little buffering. Since you can’t switch off a DIY CO2 generator, you may need to run an air pump & airstone at night to reduce CO2 accumulation slightly and if your tank is heavily planted since plants consume oxygen at night instead of releasing it during the day.

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