Wait i can tell you another method. Use your heater. Slowly raise the temp to 85 and keep it there. You can do this for up to 2 wk but usually 1 week does it for me. You can do this with or without medications.
Now here are the caveats. First, you HAVE to do water changes and also vacuum the gravel. What happens is the ich spores drop off and will recycle/reappear so you have to get them out. You do the water change and vacuum every other day. The other thing is if he seems to be suffering, put an air stone in to supply extra oxygen.
Once he’s been ich free for 3 days AND you’ve done your cleaning consistently, slowly lower the temp back down.