So the other day i looked at my pleco and noticed a really small red kinda fuzz looking thing on him. Looked like one of those balls u pull of ur shirt when a sweater or shirt balls up. I checked him out today and now that little red thing is gone but there is a big patch of skin missing. Looks almost like a burn. Its a pale white colour and looks like its a burn and the skin is falling off. Whats going on with him help please.