I don't normally mix meds, but when a fish that was sent to me as an extra had finrot, I had a hard time getting rid of it. I finally used Neosulfex, and it worked better than others. The finrot would want to restart after a week of not medicating. The water was changed daily, and it still started back up. I finally treated with Neosulfex and put in a treatment of BettaMax also. That did the trick. It went away and never came back.