When did you do the water change and when did you test? What time of the day? How long between change and testing?
Ph will drop as the day comes to an end and be higher a few hours after the lights come on.
My ph can flucuate from 7.8 to 8.2 depending on several factors, one being the time of day.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.