I had it once about a year ago when some clown loaches I bought from a sketchy shop must have brought it into one of my tanks. I treated it with 87/88 temp and salt and it got rid of it in a matter of a few days. Just be sure to keep treating for a good 10-12 days even when you think it is gone because of the life cycle of the ich. Also make sure to lower your water level or add some air stones because the higher heat will make for less oxygen in the water for the fish so you need to compensate.