Thought I'd post an update. End of the second day of QT, he's acting very in character (begs for food, runs from camera). The minor fin rot seems to have stopped its advance, so hopefully he should be showing some healing soon. Treating with 1 tsp AQ salt/gallon with the full water change each day. Here's the two pictures I managed to get through my sneaky methods (setting up a webcamera next to the tank and catching him sleeping in range
The pink coloration has spread to about half of the body, and the white coloration on his neck and head has become more pronounced. I don't seem to see any fuzz on the scales, except that one patch is kind of shiny on his right side. He's eating well, and I just ordered some bloodworms that should get here next week