Shoe coral not doing well

[Deep Reef]

I have a plate/shoe coral that started to bleach on right half.



I have had this coral for over a year and the only thing that I have done differently is run GFO due to a GHA outbreak.

any suggestions?

 

[nexusnight]

too much gfo too fast? any other corals showing signs of stress?

 

[Deep Reef]

No all others look great. I have another disk that is really looking good. Is it dead? Any hope for recovery?

 

[Bill Nye]

I have heard sometimes plate corals that look dead will actually spawn. There are some threads on this where weeks after they think the coral is dead they will notice tiny plates in their tanks.