Sorry to hear you got ich, but sometimes it comes with the hobby. I had a small case of ich, one or two spots would show up on my firefish gobies every few days then leave. I was afraid to add any chemicals, I decided to do a 50% water change and jack the temp up to 86 for a month, worked perfect. Its been weeks with no signs of anything.
Instead of telling the "what to do", I will explain the "why" also, to better the understanding. Ich likes colder temperatures, it has a longer life span (about one month) the colder the water is, thus, more time to find a host and reproduce. But if you up the temp, to my recommended temperature, it will weaken the specimen and will likely not succeed in finding a host. Their life span averages about 3 days in temperatures around 86, its the equivilant of us being stranded in the desert, chances of survival are slim. But your fish should be fine at that temp, I would leave it at that temp for about 1 month after symptoms are gone.
Under ideal living conditions conditions, only roughly 5% of the ich succeed in finding a host, the rest fade away.
Also, with a 50% water change, (you can't take all of the water, there is an established ecosystem, but under conditions as severe as ich, it can be necessary to take half the water) it will help eliminate the ich burrowing in the substrate, which is where they reside for a good portion of their life cycle.
Before you add chemicals, I recommend doing something that doesn't involve chemicals, they can be stressful on the life in the tank. That information goes for all who read this. Good luck
