I got this guy from the fish store as a rescue. He acts super healthy and eats everything as fast as I put it in. He has some parts of his fins that seem to have died and erosion of his skin around the head. Is this fin rot and hlle? I’ve given a few doses of kanaplex, but have noticed any change in a couple of weeks since I got him. The fin looks strange since there is a definitive line of where it is dead and perfectly normal looking. Should I expect all of the dead looking part to wither away and then eventually regrow? What about the area around the eyes and head. I’m patient, but wanted to know what to expect and if I should be doing any specific treatments. It’s in quarantine with copper. Haven’t seen any signs of ich or flukes. Feeding lots of nori, PE mysis, and pellets.