I have a problem my yellow tang which I have had only about 2 wks has developed what seems to be ick my tank included 2 yellow tail damsels a percula clown and the tang along with a blue legged hermitt crab I was wondering if it would be safe to treat them with copper sulfate or not I know thats not the only thing out there to treat him with but I have a bottle laying around that I had gotten for my fresh water tank when I had it.
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