Hi, I have had this yellow tang for about a year. He has always done good and he has always been healthy and has always ate a lot and has been very lively. In The past few days he has gotten very sick. He has had white on him for just under a weak which I thought was HLLE and now what looks like rotting fins and he has stopped eating and has been constantly hiding or rubbed up against something like the wall or rocks. Is there anything I can do to save him. Also I have one other tang a flame fin tomini. The yellow tang is the boss of the tank and they have there occasional scuffle however since the yellow tang is sick I have seen the flame fin beat up on him or push him into corners. Should I take the yellow tang out and put him in acclimation box (about 8x5 inches) or sump or just leave him in dt? I don’t have any other tanks. All my other fish are doing great except him. Please any advice would help.