You may want to look into levamisole (pig heartworm med) as a means of dipping your pieces. John uses it to dip his prior and believe it is effective for AEFW, nudis, redbugs....but don't quote me. There have been some threads on it, and you MAY be able to pick it up at a feed store, if not online with a script.
Its something I am looking for as a dip for new pieces but havn't gotten off my butt to find a source locally.
With that, you may be able to pull your corals and nuke the tank with Flat Worm Exit with a major dose, but I have heard recently it is not completly effective based on type and severity of infestation, hopefully I am incorrect on this.
Please share whatever information and solution you ultimatly find.
Good luck!!!!
hmmm.....vet posting above me........time for some clinical trials I think.........