Yep. UV used with another method of killing the ich is quite effective. Used by itself, it will eventually get rid of ich, but you'll be fighting a low level of infection for a while. Reason, some tomites will be able to reinfect a fish before they can get sucked into the UV. If you can use substrate cleanings and multiple tanks, along with the UV, you can whip it without meds. Otherwise, I'd use salt if possible, raised water temp, and the UV.