I use it on zoas. I've heard that you can use it on other things as well, but i never have.
For zoas, i acclimate them to the tank for the normal acclimation time, and then get a bit of RO water and put them in that for like 15 minutes. You'll see all kinds of worms/pods coming off that rock. Most will probably be good, but you may find a bad one every now and then. And then i just put the zoas in the tank after that 10-15 minute dip. Usually takes them a bit longer to open back up after a dip, but they've all done well for me.