I currently have 60w NO on this tank. I was using the hagen DIY on it and had the Excel from a planted 3 gal. Nano. I dosed the recommended Excel and didnt want to kill my new fish. I have found that although the Co2/ph varies using the hagen natural plant system, it doesnt fluctuate enought to cause problems. I have let the the thing run out before and does not send the PH rocketing or anything.
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