Little HELP Coral Bleaching

[zenzence]

Hey,
Never had this problem before with any of my corals. Have many healthy corals lps and sps. This coral is just not doing well.

I have changed its location from high flow to low, high light to low light! NO luck

I have a 90 gallon with 175 MH lighing and excellent h20 except ph is currently a little low I am fixing that as I type. This has been going on for some time now.

Any Suggetions would be appriciated

Thanks