I'm hopeful. Here's a pic from today, 24 hrs later. The good signs are her mouth is nice and tight, and she's clearly got herself all the way down in the sand with her foot on the bottom of the tank. The iffy part is she's very tightly closed at this point. I don't think the little bit of black gunk floating around there is really of any concern.
I know about the zoas. Sucks too because they are really wild colors. So far they seem to be ok though. Who knows... maybe the far side will start to spread away from him, so even if the near side gets zapped it will be ok.