torch coral sick

[idan555]

Hi guys,
I notice today that my torch coral is looking bad.
Ph 8.4, nit 0, ammonia 0, nitrite 0, calcium 420, magnesium 1400 (redsea test), phosphate 0. BUT temperature was 86! instead 78, was few hot days and AC was off most of the day, I put UV stabilizer just in case...
please see pic:

thanks for the help!

 

[idan555]

one more:

 

[garygonzales]

maybe just too much flow...