I've been treating with heat and salt for about a week and a half now. It started with my keyhole but he's been ich free for atleast a week. The only fish that just doesn't wanna seem to fight it is the chocolate gourami. It keep vomit back to him. I'm dosing 4 tbspn of salt in the tank(32G) since I have scaleless fish and the heat won't go over 84F even though it's cranked to 88.