Randy Holmes-Farley
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My Tank Thread
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I'm not sure the pH is that low since pH did not rise higher than 8.0 with extensive outdoor aeration, and I would not conclude you cannot do it, but I might try some additional steps as well as keeping alk itself higher than 7 dKH.
What is your alk and do you add anything to maintain it?
What is your alk and do you add anything to maintain it?