Puss wart/pimple on head of butterfly
Hi, I have a Copperband Butterfly fish, newly acquired into my tank and has developed a pimple like spot on the right side of his head. I've kept a persistent worried eye on him for atleast 5 days and he doesn't seen to he acting anything strange, just timid but active and feeding. Just now I noticed his pimple had burst and now a white like substance is hanging off but still leaving this pimple behind. Do I need to act now and work on getting him out of the tank to treat him in a quarantine tank, or let him be and hope he can just live thru with no drama.
I've attached a photo so if anyone can help or at least give me an idea where to look for ideas I and copper would be very thankful.