Just thought i'd share, i recently successfully treated an ich outbreak with heat/salt, here's how you do it:
Slowly raise your temperature to about 86, this speeds up the lifecycle of Ich
Before you add salt, you can do a 50% water change to reduce the amount of ich in the water, this is optional
Add about 1 Tablespoon per 10 gallons of water. The next day, do the same, add 1 more Tablespoon per 10 gallons of water again. This comes to about 1 tablespoon of salt per 5 gallons of water.
Keep the heat up until you don't see ich anymore on the fish. When the fish look clean, keep the temp up, and start doing water changes to reduce the salt. I actually did a 50% water change for two days and then went back to my regular schedule, the small amount of salt left won't hurt anything.
I would leave the temperature up for 1-2 weeks, just to make sure its killed off, and then you can slowly lower your temp, i have mine at about 84 right now.
Im sure your probably already treating, but i hope this helps.