So recently all my monti frags in my frag tank died out of no where. Fast forward a few weeks later I moved the frags to my DT and they are still dying. I was trying to frag some on the remains and noticed I had nudibranches. I have a large colony that is attached to a blue ridge coral. I can remove the coral but I would like to do this last if possible. What do I do to get rid of these things? Any help is great

