pH drop from 6.5 to 6 is normal when you do CO2.
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Well I know its normal, the question is should I do anything about it. Need the tank to keep it's bio filter, and now I have one danio in there I don't want the nitrites(which are very low but super acidic makes them much more toxic to hurt him) Thank you.
I got the malawi buffer salts in the mail today and could use some of them. I feel like my ideal PH for plant and pea puffer is more like 7 anyway