I guess you have a few options.Have not witnessed them eating zoas.
So I need to use pesticides? I was going to refer to that as a last option since I don't have another tank setup for the other inverts.
a month, but I've added coral from a tank that had marine ich therefore I think I need to reset the fallow period?
1. Take out each coral, dip it with something that will kill the pods or at least make them fall off the coral, and put the dipped coral in another (temporary) tank.
2. Do the first 2 steps above and siphon out as much sand as you can, before putting the coral back in, to hopefully put a good dent in the population, and do a large water change.
3. Remove all other inverts and treat with interceptor (although some people have found that this does not work very well for large infestations).