As mentioned above, there are two schools of thought on ich. Eradicate it or live with it. I personally do not recommend living with it if you are not experienced in keeping parameters stable. By stable, I don't mean within acceptable ranges. I mean Ammonia 0.00ppm, Nitrate 2.0ppm, Calcium at 420, Mg at 1350, Alk at 8.5dkh. Stocking levels must be appropriate and nutrition must be top notch.
Tank transfer method IMO is the best for treatment. 72 days without fish in the system to allow the parasite to die out. Copper works as well but not in the display either. Other methods at this point offer a bit of relief at best and are snake oil at worst.