Hey guys I need youe advice on what to do with a sick Naso tang. I woke up this morning and found him swimming at the top of the tank. I don't see any apparant signs of bacterial infection on his skin. I tested oll my water parameters and everything is ok all other fish and corals are dong fine. I removed him and gavie him a freshwater bath and placed him in my QT tank; I'm using erythromycin to treat the tank. He keeps expeling wastes into the water and continues to swim on his side at the surface of the water. Any advice will help. Thanks.