Epoxy sandwich method:
(1) Have a small bowl with your tank water, and frag to mount inside that bowl
(2) If a ‘T’ shaped plug, clip off the bottom "stick" part of the plug, use wire or bone cutters. Put frag disk with coral back into water
(3) Steps 4-10, describes the sandwich method which is glue, epoxy, and glue.
(4) Take a small pinch of epoxy off the roll, about the size of your thumb nail.
(5) Mix together
(6) Roll into a small ball of epoxy; I use a finger to indent one end of the ball.
(7) Apply some super/crazy gel glue (stess gel as it's thick) on the bottom side of the frag plug where you cut off the stem (yes it should be out of water now).
(8) Put the epoxy ball (where the indent is from your nail) on the plug.
(9) Use your nail again to indent the other end of the ball sticking upward (this presses the ball into the glue too).
(10) Place some glue on the top of the epoxy ball where your nail imprint is. So the sandwich is glue, epoxy, glue should make sense now.
(11) Place your sandwich frag inside your reef, to the rock location and angle you want it to stick at
(12) All in one motion:: push down on the bottom of the frag disk, give it a ¼ turn, and wait 2 minutes before letting go. In that time, move your fingers to ensure you’re not glueing yourself to your reef. (Also make sure power heads or any flow is off for about 20 min, flow will likely knock any frag off if left on).
I use Two Little Fishies Aqua Stik (red color) and Bob Smith Ind Maxi-Cure Extra Thick CA Adhesive Glue – you can use any epoxy (as long as it’s safe for drinking water, it’s safe for your reef) or any gel cyanoacrylate.