Mine ranges from 7.8 -> 8.5 depending on the day/month/season/temperature/colour-of-my-hair/etc.
I don't do anything to control it, and really don't care what it is, but it's cool to watch the fluctuation more than anything. If things aren't melting I won't really care, and truthfully I wouldn't look at controlling PH directly anyways 
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Single System Setup: 210G SPS reef, 225G FOWLR, 72G water change, 50G frag, 120G sump. I promise a journal at some point! (anyone need some coral frags? I likely always have stuff that is frag-ready)
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