Superglue (gel kind) can work..
They make a 2 part "putty" you mix and can use in the water.. <--a bit better for a complete underwater application
Some commonly used products here..
http://www.bulkreefsupply.com/saltwater-aquarium-fragging-supplies/super-glue-epoxies.html
Small screwdriver, pry bar, whatever works, spoon, fork, etc..What's the best way to remove an sps coral from the frag plug?
Superglue may sound scary, but AIH it was created for medical purposes, wound sealing after stitches where skin is fragile.
What's the best way to remove an sps coral from the frag plug?