7.9 is right in the acceptable range? OP is a new tank owner (less than 6 months in from other posts), advising chasing ph to raise .1-.3 ph seems unnecessary in my opinion. Posts like yours are a bit extreme sounding from my point of view. To each their own though
It is right above the minimum range at 7.8, so its not ideal. I am not saying chase pH (albeit that term is ridiculous considering we do it for everything else in this hobby). I am simply stating that its not ideal. Not ideal doesn't mean deadly, but likely has behavioral and growth implications.