Gather your materials. You will need:
- Super glue gel, I prefer Loctite brand to any others, but it must be the gel kind and have Cyanoacrylate as the active ingredient.
- AquaMend putty, or any other kind of underwater stick putty. Sold at Home Depot for around $3.00 a tube.
- Paper towels
- Your coral frag!
Find the correct location in your tank for this frag. Take into account the flow and lighting the area provides, match that with the requirements of the coral frag. The area I chose for this frag has a large divot, so I will be using more AquaMend putty than would be needed for a more smooth surface of rock. The putty is used to fill any holes between the live rock and coral frag. The glue is what actually does most of the bonding.
Trim your frag plug if necessary. For this plug I cut off most that I could without compromising the coral. Frags are also sold on live rock pieces or on their own. You will only need to trim to match the type of aquascape you are looking for.
Mix up a small ball of AquaMend putty. This can be done before you bring the frag out of the water, but it is a quick process, and most coral will be fine out of the water for a short time. Make just enough to fill in any holes or areas that are on the live rock you are attaching to. Using too much here can make your frag look ugly in the tank, since you will see the white putty.
Apply the super glue gel to the frag or plug. I generally dab dry the coral with a paper towel, or blow off water with my super strong lungs. Use the correct amount to make a secure bond for the next step, but try not to add to much that it will ooze onto the coral itself.
Apply the putty ball to the super glue on the frag. You don't need to push very hard, just secure it to the glue.
Apply another layer of super glue gel to the top of the putty. You can dab dry or blow again. Super glue gel will cure to a wet surface.
Stick it in! Dunk the frag and all the glue and putty in the water. Secure it to the placement point you picked out earlier. Give it a firm push, turning the frag plug slightly to get the putty and glue in all holes and divots. Be careful to position it to best hide the white putty.
Enjoy! You now have a coral that is secure on your live rock. The putty and glue will both cure and harden under the water. Some applications will require you to turn off the pumps, but for this demonstration I had all my pumps on. If gluing a polyp with glue only, it is recommended to turn off all flow and allow the gel to cure.