There are a few posts on this. Here is a link to another one that has a few different options available. Bumble Bee snails, KZ Coral snow, AptasiaX, Glue and scraping are all options. I have used scraping and glue with minor success. They just seem to pop up again elsewhere.
I just dipped a few dozen corals in bayer on Saturday. I have a few verm tubes and I dont see them coming out. They might still be there though. Not sure yet. I did pull a bristle about 4-5" long. He was completely shocked and barely moved. I dipped for 30-40 min long.