Marine Tools
Coral glues and plugs: gel and instant glues, epoxy putty, rock glue for building the reef and frag plugs.
Advice and care
How to choose coral glues and plugs
The glue depends on whether you are fixing a small frag or building the reef.
Small frags
Gel glue sets quickly in water and holds a frag on its plug.
Big joins
Epoxy putty is safer for joining rocks and large corals.
Building the reef
With cement-based glue the reef is built outside the water and left to harden.
Popular brands
All brandsFrequently asked questions
Is the glue safe for corals?
Glues made for aquariums are safe in water once set. Use a small amount and follow the maker's instructions.
What are frag plugs for?
A frag on a plug is easy to lift, move and later fix into the reef.
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In a marine tank, everything placed on the rock has to stay there. Strong flow, fish and shrimp shift loose coral pieces, and a fallen colony can be damaged or end up in the shade. Glues and plugs help you fix corals securely and build a stable reef.
There are several types of glue. Gel and instant glues set under water within moments and suit small frags. Epoxy putty has two components: you knead it between your fingers until even and shape it around the joint, so it suits larger pieces. Cement-based rock glue is meant for assembling the reef outside the tank.
Use glue sparingly: too much does not make the joint stronger and stays visible on the rock. Pat the spot dry if you can, hold the frag still for a few seconds, and grow new frags on plugs that are easy to move around the reef.