So I noticed that my rainbow threadfins (a new purchase, 2 days ago) had some white spots on their fins. So quickly I added salt 1tsp/gallon and raised the temp to 85 degrees. 24 hours later, no more ick on the rainbow threadfins! Also ick never spread to the other fish. How long do I continue the salt and heat treatment. Also, was this maybe not ick? It seems like 24 hours for all the "snow" to be gone is a bit quick.