tissue damage

I recently acquired a red montipora from a friend exactly one week ago and all of the sudden, the tissue appears to be falling off. Within about six hours it is almost all white. All of my water parameters are in line and the only thing I can think of is my lighting may be different and/or...

Hi, I am starting to get into SPS and I just bought a frag from a local fish store. I just noticed white at the bottom and I am not sure what it is. I was hoping y’all could educate me. Thanks!

I just got these kryptonite candy canes a few days ago. They split between the pollops after bringing them home and now the tissue is receding. I’ve moved them higher in the tank where the flow is less and they’re about 8” directly below my light to get some good light. What can I do to help...