im on a rampage getting rid of these things. got some coralrx, have been picking them off as much as i can. Gonna dip from now on. Everything got a ro freshwater bath, and like reefwars said, not too much effect on the nudis. I have been able to take a fair bit of them out by hand, and have been inspecting constantly. Hopefully all goes good and these @!*$*# dissapear.