stylophora death

I got all of these these coral frags in October 2023 and they were all thriving, bright and happy. A few weeks later I had a big alkalinity spike, killing most of my fish and a few bigger corals. Everything got sorted, and my LFS housed the remaining frags and fish. Since then I’ve had a bit of...

So in the last two weeks my tank has gone from great to bad my female mandarin starved (out competed by male) my acropora colony bleached / turned almost completely white I'm not sure why my stylophora frag bleached / turned almost completely white I'm not sure why my torch coral has lost...