Hello all. Second post here. I am currently getting more involved with my reef tank. I've had it for almost 2 years. Anyway, a few months ago, i had an aptasia problem and bought some peps which took care of it. In the process however, I tried some "Joe Juice" which some in MARSH said was just a heavy kalk mix. This seems to have killed off some of my zoos and gsp.

I was wondering if PH plays a piece in keeping/killing these subjects. I always have my nitrates in check but just started checking ph and it was at like 7.7, so I started on a buffer dkh program daily adding a fresh cup with one teaspoon mix.

Does this seem like my problem and does it seem I am going about resolving it the right way?

All throughout this ordeal my other corals did okay so I'm just hunting for the answer. Thanks in advance guys.