Yeah, Im really sorry to hear about your fish

the one i mentioned that had the fin rot w/ the white dots on the fin that i treated for ich and fin rot is better and trust me I thought i was going to lose him because for a while it looked like his fins were rotting away. I would definately recommend quarantining him and raising the temp to 82 degrees and treat him with the medicine. I used fungus cure and super ick cure, both by the same brand,
API. So far i find these products effective. I wish you luck and i hope your fish is okay! and i agree Id love to see a pic of your fishies!