yesterday i noticed that my fish had missing scales at least thats what it looks like (skin coloured parts on body) Also another fish has scales that are sticking out, which is what the other fish looked like a few months ago. Is it possible that the first fish has a contagious desiese, or is it that the two fish have been fighting if its a desiese, do u think it will die? SHould i isolate the 2 fish from the others?