Securing corals with epoxy or other methods

[trilinearmipmap]

My corals keep getting knocked over by my various crabs and turbo snails.

I have two montipora digitata frags which I epoxied onto round plugs and set the plugs on the rockwork. However they kept on getting knocked over. I've tried to epoxy the plugs to the rockwork but it won't stick. I am using super-glue gel, it doesn't seem to want to set well under water.

I also have several LPS corals which have been knocked over and they didn't attach well to the rocks with epoxy either.

Any suggestions, alternate epoxy products or other ways of fixing my corals in place?

[muck]

I would try AquaStik Epoxy Putty.
I have never used the product though so hopefully someone can jump in and comment on how well it works.

AquaStik™ Stone Grey. Underwater Epoxy Putty for marine and freshwater aquariums, Ponds and Paludariums. Also useful in Reptile & Small Animal habitats. Neutral color. Non-toxic to fish, plants & small animals. Cures dry, damp, or underwater. 4 oz. (114 g).

AquaStik™ Red Coralline. Underwater Epoxy Putty for marine aquariums and reef aquariums. Color matches coralline algae and live rock. Excellent for securing rock, stony corals, gorgonians and aquatic plants. Non-toxic to fish, plants & small animals. Cures dry, damp, or underwater. 2 oz. (57 g).

[IslandReefer]

Having many small frags and several Conan sized hermits and two large tubos...I hear ya!
When I get tired of uprighting, I glue to a bigger rock. Esp for the digitata...just snap it off the frag cookie etc (becomes another frag) ; select a fist size rock (size depending on size of bulls in china shop), with a hole or depression ( or make one carefully); insert coral with wrap of epoxy (works really good but looks bad for weeks) or add gel super glue (frag glue) to where it touches the rock...hold out of water for a couple min. place in tank. (The gel seems to harden as soon as it gets wet). I use the same thing with LPS eg candycane and a frogspawn I just got.
Just pick a rock that is big enough and has some start of a socket -like hole to help support whatever glue you use. I find the epoxy better for support, but doesn't really stick well and super glue gel (my fav) better looking but can break...use lots of glue and several tries. With a little rock wedging and planning works great for me. As an aside, if the coral slimes eg shrooms, zoos..I blot with paper towel then super glue quick.
Hope this helps