I personally haven't dealt with the Monti species but I have dealt with the zoa eating nudis and they were a pest! I didn't have them bad but I did have them non the less. my only treatment that I used was when ever I seen a colony with a nudi on it, I would pull it and Lugols Dip it. after a month or so individually dipping peices here and there, I was bored one day so i pulled all my rock and corals, which isn't much 37g tank (55lbs rock) 20/30 different corals. and I dipped everything to the max recommendations on the Lugols directions. Ever since, never seen anything!