What kind of glue do you use to attach zoanths to plugs or rock?

I bought a little plug with zoanths a couple of weeks ago, and I guess they were not glued down well, after 5 days, they all detached except one.
The rest of them have been floating around in the tank. Whenever they come to rest, they open up to the light, so I assume they are still alive.
Yesterday during water change, I snagg a big piece, and placed in in the rocks, it opened up, looked good, but later it had drifted away again.
I understand you use some sort of super glue, but what kind? I'd like to anchor them somewhere!

i use loc-tite GEL superglu... take ur frag, dab it dry with a paper towel, apply glue to plug, or live rock rubble, then gently smoosh ur frag onto it, wait 20-30 seconds, place in aquarium. Boston Aqua Farms make a product called reef glue. its purple to look like coraline algae, good stuff just the loc-tite is cheaper.

if you are trying to attach a frag to something underwater i use Boston Aqua farms reef epoxy, u knead it together to "activate it" smoosh onto frag, then smoosh it onto your rock in the tank. Iv'e noticed it makes my skimmer foam a bit, so u might want to shut your off for a day or two after u use it.

Reef epoxy & loc-tite ultra gel:

Thanks! I wish I had some the other day when I found all those little polyps that
floated off their plug. I tried sticking them in a hole in the live rock, and they looked good there, opened up pretty, but a few hours later, they had floated away, I havent' seen them since, lol.

ive been there! now it just a matter of if i have any glue left