I just got through with a bout of ich on my blue hippo. I left him alone in the tank and kept feeding him mysis with garlic extract and vitachem. Someone suggested to me not to net him, placing him in QT, as this will stress the fish more. So I just fed him daily and did the usual tank maintanence. He pulled through. So IMO leave him alone and feed well with garlic. At least this worked for me. Good luck with your clown. Hope all goes well with whatever you do!