I have my fingers crossed, but as of yesterday, there are no little white spots on Jazz. It seems that increasing the water temperature might have done the trick, and honestly, he seems happier at 80 degrees than he did at 78, if that possible.
On the other hand, his fins are getting more shredded looking, so yesterday, when I did water exchange (about 50%), I added aquarium salt along with the stress coat. Is that the right thing to do to encourage healing?
Thanks for your advice on the ick. I'm keeping a very close eye on him to make sure that it's really gone, but for now, my pretty blue and red fish has no little white spots!