I bought a Kole Tang that in very short order that has a 1/8 to maybe 3/16 long by 1/8 wide hole in its cheek. I am going to move it to a qt tank. I have done some research on line and looked at various medications. The hole doesnt seem to be getting worse but the fish is losing weight. It is still eating and swimming well. I am curious about other reefers experience and the fishes' prognosis. Should I treat all the fish? I QT the fish for about a week before putting it in the tank and it seemed fine and only a few days later it had the hole. It doesnt appear to be an injury.