Tips on glueing:
1) Get some variant of superglue gel. It must be the gel kind.
2) Get some reef 2 part epoxy sticks.I find the green works best for me.
3) mix up a good size ball of epoxy, more than you’d think you need. 4) Put a big gob of gel glue on one side, again more than you’d think you need
5) Stick your frag (plug or no plug) to the glue
6) put another big gob of gel glue on the backside of the epoxy ball
7) Quickly plunge the whole thing into your tank and press into place before the glue hardens in the water.
8) use your fingers to form the epoxy around your frag plug and create a stable base.
The epoxy takes awhile to cure but the glue holds everything in place while that happens. You may want to use gloves as the epoxy sticks to your fingers badly. Run your skimmer afterwards, it may go crazy and overflow but your tank needs the oxygen with the new epoxy in there. You might also want to run some carbon for a bit afterwards.