You still have some polyp extension, which is good, but it's a little retracted. It's tough to tell from the picture, but I think the base of the coral looks distressed as well. Assuming you tested all your parameters and they are all in line, I would look to lighting and flow. Is that Vortech in direct line to the frag rack? Maybe too much "Direct" flow irritating/stripping the flesh of the coral? Did the coral bleach or brown out within the past month? Could be a placement thing depending on what you observed. I would try blowing off the algae with a turkey baster, and move the frag down away from the direct flow of the vortech and maybe towards the bottom. See how it does for a week or two, so you can try to narrow the possible causes. Good Luck.
