I am new to having a saltwater tank. I bought my hippo tang about a month and a half ago and I have noticed a week or two ago the color is starting to fade. There are no spots on the tang. This morning when I was feeding them it seems to hide in the corals. It comes out once in a while. I have been feeding them live brime shrimp, frozen brime shrimp, frozen mysis shrimp, frozen spirulina brime shrimp, and seaweed. I do water changes every week. I have noticed that it has been rubbing himself on the rocks and corals. My yellow tang does this too. What's wrong with my tang.
lyn
lyn