dang. That really sucks. Sorry to hear that

BUT... LEAVE THE SKELETONS IN THE TANK! They are known to drop out little baby plates when they die (not always, and mine sadly did not do it or I do not think it did). Plates are the only corals that actually have a lifespan and live about 10 years (not saying yours died from age, but they do eventually die and I've heard if they are going down a rough path they sometimes just say you know what I'm gonna die, and sometimes they just will go from healthy to crawling toward death. So don't feel too bad, they are known as easy corals for some reason, but I think it has to do with chance and if the conditions in the tank are right. Not saying yours are bad or anything though. But yeah mine did not make it either, but I had worse tank conditions (very high phosphate) and I overfed mine. and I should have just waited longer to buy mine. Sorry about the coral. I would just leave it there, and it might pop out a few babies. I'm not 100% sure what to look for though.