Just got this guy about a week ago. Has some fraying on the tail which I suspected was from the clowns (since the tang likes to go in their nem!) but today I noticed on his top fin what look slike rotting flesh. There is a small spot which is clear and looks kind of dead. Is this possibly fin rot? Anything reef safe I can treat with? Kind of hard to see in the pic but I can cicle it if needed.
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