Grown under 2x Red Sea 90s before switching to radions. Redsea xl 300Sorry if i missed it but what is your full stocked fish list ? any angels in the tank?
I have the same issue as you and i am fairly certain its my coral beauty nipping at them .
The other similar thing i noticed is you have red sea lights same as mine. I have wondered if this was an issue for me ? or could be for you as well ? maybe not the best lights for growing SPS ? someone with success and Red Sea LED lights can chime in and correct me hahaha please tell me its not the lights and its me haha