Hi there, Ive recently started up the hobby with marine fish and gradually worked my tank up to put a pair of clowns in a couple of months ago I bought a blue tang about a week ago and a fire fish a couple of days ago from the same shop... however i noticed on the blue tang it has a white bit of excess on the tip of its fin?? There are no spots on its skin but it was scratching itself of the live rock.. i have a few pictures. I have moved the blue tang into another tank at the moment to protect the other fish. Any help would be much appreciated! 
:hmm2: