I don't think fragging and moving to another spot in the tank will be effective. I had a bout with some and fragged, moved and inspected. They always managed to find a way back. Best bet is to remove the monti and treat leaving in a qt until the nudis are dead. Treatment won't kill the eggs, so you have to repeat treatment until you have knocked them all out. They will die in your display tank without a monti to chew on.