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The idea of gluing frags is to use just a little so that the coral grows around it and cements itself to the rock in a few weeks. A small dab just enough to cover the bottom of the cut is what I use.
I also avoid Turbo Snails.
If it's Euphyllia (frogspawn and it's cousin varieties) and I can't find a nice hole that will hold the stalk, then I may use epoxy with a sand coating to make it look more natural.