Amano only has CO2 for the photoperiod and he turns it off at night. By lowering it or increasig, he means it depends on your fish and your plants. Each tank has a different demand and limit for CO2, I lower it if my fish are gasping and I increase it if I see bba or deficiencies from my plants. How much to lower or increase depends on you and your plant, kind of like the EI method. |