Sick regal tang. Please help.

[copenhagen_cowboy@live.co]

The only other fish were two small clowns, purple fire fish and a royal gramma. There wasn't any conflicts. I will just keep a close eye on the rest of them and add soak sone food in garlic. The tank has been running for a few months now and my levels haven't been fluctuating. I'm thinking I must just not have nipped the ick in the ass all the way. Thanks everyone