I bought a medium sized Naso Tang last week from Austin Aquariums. He was in a tank that was separate from their stock tanks and was very fat and looked healthy. I brought him home last week and put him in his new home. He was eating within an hour and by day four or five, I had him eating out of my hands. I know tangs can be difficult to keep at times, but I think I found me a good one. He seems very happy in his new home.