Out of all the zoas in my tank, the most expensive ones start to melt. Came home today to see my macaws closed up with what appeared to be a film of something on it. Maybe a fungus, its not cyano. I blew it off and each polyp that had this on it looked very weak and almost as if i could rip it off just by blowing water on it. Is there anything i can dip this in to fix it? I have 1 left that is doing great but all others have this and they are on multiple plugs. I actually sold one to kevin and this happened to his yesterday and now today mine started. Any help would be great.