I can say it kills red bugs as well as monti nudis. (Asterina, brittle stars and Copepoda as well)
While not a tank treatment, it seems to be a pretty darn effective dip. I can't speak for Zola nudis or any type of flatworm, but I did watch it knock out RB's and monti nudis within minutes of treatment. It seems rather safe for the few corals I treated, and I plan on treating every coral in my tank in a couple weeks when I move/upgrade. I will post if there's any problems/losses. I got mine on eBay, only place to get it without paying an extra $10 for shipping.