Ph Changes?

Gabcas

Junior Poster
Oct 10, 2015
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hello, I used to have a non co2 tank and I remember that the pH was very changeable when the lights went on the pH rose to 8 and when they turned off it dropped to 7 or 7.5, my question is? Does this really affect a fish? Or the fish can live happily in a non co2 tank? Thanks
 

FxFocus

New Member
Aug 17, 2018
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United Kingdom
I've come to the conclusion that within reason the actual PH doesn't matter so much as the reason why it's at a particular level.
Again within reason a rapid change in PH due a change in dissolved CO2 is not harmful as many will attest.
I would think it safe to assume that since your PH changed after lights out it was due to an increase in dissolved CO2.