Try this: place a small amount of reef epoxy into the crevice of the live rock. Put a little thick-type crazy glue on the base of the frag and shove it into the epoxy. If you want to mount the frag first: put a little glue on the wad of epoxy and stick it to the plug, then a small amount of glue to the frag and push it into the epoxy.
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225g reef
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