Wormwood is the supposed ingredient in Flatworm Stop, but nobody knows for sure. Boom also has noticed elevated levels of iodine in his frag tanks (not awful, but still elevated), so there could be some iodine in there too, but no idea which kind.
I just mixed up 2 liters of wormwood solution. I am going to dose it to my frag tank. I do not have AEFW, so this is more to see if the stuff is reef safe. If so, then maybe somebody can try it on a AEFW infested tank.
Just remember than any worm can survive a dip or two and hang on when basting... maybe not for more than that, but this is why it is so important to keep on dipping or wait-out the lifecycle. Life finds a way, so be diligent.