hey every one. I just picked up a purple tang from a friend that has been in a neglected tank. It has not had a water change in 1 year and no skimmer just live rock and a hang on filter. He is fat and active but has white on face around eyes. And his tail fin has some small chunks missing. Just want to know what I can do to help him recover. He has been in tank for an our now and already out and about and dose not hide when I walk up to it. Any advice would help thanks


