AquaStik Epoxy Putter is an underwater epoxy putty designed for marine aquariums and reef aquariums. Color matches your coralline algae and live rock with the coralline red option, or match new rockwork with the grey option. Excellent for securing rock, stony corals, gorgonians and aquatic plants. Non-toxic to fish, plants and small animals. Cures dry, damp, or underwater.