So, for my 20 gallon high, lightly planted and highly stocked tank, 2.5 wpg, would it be a good idea to get DIY co2. I fso, what would be a good size for my tank, and how would I make it. I would want to make sure that since it's only 20 gallons, I don't inject too much co2, so the fish die. PICS PLEASE
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