Zoanthids closed for days?

[miami298]

I had added a large bubble tip anemone which seemed good for days. I'm not sure what exactly happened next but little by the different corals in the tank started to get affected. Zoanthids all closed up, anemone started looking unhealthy and a monti I had started bleaching. Prior to that everyone was happy so was there some sort of chemical warfare going on or is there something I am missing?
Water parameters seemed fine other than Calcium, which I haven't gotten an accurate reading on and sg was a little high at 1.0275

 

[reefkprz]

1.0275 is high but it wont cause any problems unless this was a quick jump, my reef is run at 1.027 always.

 

[tx reef]

I don't think that 1.0275 is high at all. I keep my reef at 1.028.
I would definately be looking for other issues.
What did alk. test at?