The salt and raised temperature cure works. No need for meds for ich. Clowns and cories can handle 1 tablespoon/5gallons without distress. Most live plants can too. If you go this route keep the salt at this level for at least a week after all the spots have disappeared.
Remember, you have to add back enough salt to keep the concentration up when you add new water due to water changes. If you top-off during this time, don't add salt.
I might get flamed for this, but table salt is ok, as long as it doesn't have anticlumping agents, kosher salt is ok, "fish" salt is OK, and pickling salt is OK. The iodine in tablesalt won't affect the fish for the short duration it's used in the application.