So my pH starts anywhere from 8.0-8.2 and gets anywhere from 8.4-8.5 some days. Is this swing and range good? Worries me a little bit, but my levels tend to stay pretty level. @Randy Holmes-Farley
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That seems OK to me, but the slightly high swing suggests less than ideal aeration and so that O2 may not be adequately exchanged at night (nothing to do with pH, pH is just an indicator of gas exchange).
Do you have a skimmer?