7.8 to 8.3 is 100% normal.
But +1 to all the comments. pH of tank water in reef tanks is nearly useless to track. It's a resultant value of other more meaningful numbers.
Useful to track in a calcium reactor though, since you want to add enough CO2 to drop the pH in the chambers to 6.7.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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