I had Zoo Nudi infestation before. Although They look colourful they're the reason why almost 50% of zoo population on my rock were closed and shrinking. You could also see the eggs on the front glass and on the closed polyp zoo.
I tried with flatworm exit even tripple dosed, it did not work. I even finished the bottle in two tries.
Then I decided to buy 2 yellow coris wrasse after reading about them. I read that not every wrasse are guaranteed to remove aquarium pest so its kind of a gamble but for me the fact that I wanted some yellow in my tank made me buy these beautiful fishes.
I did my part with manually removing some nudis that I find by turkey baster or water jet/powerhead and scoop them out with fish net.
I dont know if they eat the eggs or the hatchlings but over time my zoos started opening up, the nudis and their eggs started disappearing little by little until they're all gone.
my little 1.5 inch coris wrasse hunting.