I ended up losing both rays that had it the worst around their discs while I was away (so not too sure how much worse they got). My large male also had it, but his spot was a big bloody spot (about 1.5" in diameter) with a ton (easily 1/2") of bloody mucous hanging from it on his underside, maybe 2-3" in from the edge of his disc. Salt, raised temp, and pimafix seemed to help the male. Not too sure if I just didn't catch it soon enough on the other two, or if anything else would've helped them.
