My Toadstool Leather has been closed up for about 3 days. I noticed yesterday the base of the coral has turned grey and is peeling from top to bottom. Thr top has 'slimed' before, but this is different. It is also starting to bend over. Is this something natural or do you think it's dying? All of my other corals are doing great. I have syphoned some of the dead skin out with a baster. Anything else I should do? Thank you.