Am I the only one who has this issue? My normal PH during day and while lights are on is 8.23 - 8.35
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It goes up? How high?
If the pH "spike" is sudden, it is electrical interference from the lights.
This is a common problem.
Try measuring the pH of some tank water in a cup away from the tank, both whent he lights are on,a nd after they go off.
Agreed, but if it's not a sharp spike and it is just rising at night, this is pretty normal. Try installing a refugium to help stabilize pH.
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