I've given up on the frag. I need to snap a last pic and send it to the guy who sold it to me, hopefully I'll be able to get something back for it.
On a related note, I replaced it with one that is doing wonderfully. Got it for $40. More than I usually pay for coral(I like frags

) but it's a nice one. Green and pink, and had been sitting at the LRS for as long as I can remember.
Edit: The white spots on the disc are sorta new. Happened there in the past week or two. Still, this one is out and happy all the time and I've got the feeling they allowed gunk to settle on the disc to get those spots.