I've had an ich outbreak here and there before but been able to remedy it with heat and frequent water changes. Usually after a couple days of 84ºF the ich dies off and then I leave the temp there for an additional two weeks after the ich clears to ensure it's gone.
This time it hasn't been so easy. 84ºF did nothing after a week, so I bumped the temp to 88ºF for over a week, and not a single bit of ich cleared. I've dropped the temp to 84ºF again to reduce stress on the fish.
It's now been over a month and the ich seems here to stay, no amount of heat and/or water changes seems to be able to clear it.
What should my next course of action be? Or, at this point, is it sill even ich? It looks like ich, but it may be something else considering how resilient it has been.