Please help my SPS!!!

[Lionfan]

Hi guys here is an SPS that has really changed the last few weeks in my display. I have had it for years and it has always looked good, All other SPS are fine parameters all OK. Cal480, ALK 9, and Mag. 1280. T5 lighting and is 3" from the lighting (up high) I will supply before and after photos. Can you give me any info on species and what I can do. I have alot of flow in display. which is 72G barebottom mature tank over 10 years old. 3 fish in display. Feed flake and once a week cyclopeeze. Like I said rest of coral over 40 species SPS and Lps all fine. Here is photo when healthy