Okay so im a little worried about my clown fish. I dropped the pair of them in a week and a half ago and they were doing fine. two days ago i dropped in a blue hippo tang and a naso tang. today, i checked my one clown fish (the other does not have this), and it seems as though it was a film covering its body, almost looks like dead skin. no other fish have this. I couldnt snap a pic. does anyone know what this is? ich im thinking? what do do? help!!!