Melting Zoas/Paly's

[noirsphynx]

I'm getting to my wit's end with them melting for no apparent reason. I have lost so many over the years that I think I'd cry if I ever sat down and thought about what I had and don't have now!!! I recently lost my Jason Fox Blood Shot's and now my Space Monsters are melting away I don't have spiders, nudi's or pox or anything I can tell that's bothering them. I do have asterina stars but they never go anywhere near my zoa's/paly's. I did notice something a couple weeks ago, there was something strange looking on the inside stalk of my space monsters(notice the dark lines inside the far left play, this is also the one that melted on me a couple days ago) They also look skinny and so do a couple other of my paly frags.