I wouldn't try to make ph changes at this point. It's borderline on the high side but doesn't justify action at this point other then getting the reading verified.
I have huge flow in my tank that causes micro bubbles during the day. That and my over sized skimmer shoot my pH up to 8.6 daily. I don't have any problems with fish or the mixed reef. It drops down to 8.1-8.2 in the night. I wouldn't worry about it.
I agree with everyone else, don't do anything to it. Let the tank takes its course especially its still new. Also try calibrating your pH probe or test with test kit.
99% of the time, messing with the pH will be more detrimental than not. The remaining 1% is usually when the aquarist fucks up (HCL acid to clean, Kalk aiptasia, etc.). Agree with everyone else, don't mess with it