Pretty much all the nudis have very specific diets and aren't really gonna fare well in home aquariums, unless they're huge aquariums. That doesn't mean that I wouldn't try a couple of them as pest control, but I'd probably just use them to combat the pest and when things looked better I'd try to sell it off to someone else having an problem. The ones that I'm thinking of are ones that eat algae, flatworms, or aptasia.
I wouldn't put any nudi that I hadn't really researched beforehand in a tank, as many of them are coral eaters, and or poisonous/toxic if killed.
B