TLF AquaStik Stone Grey Epoxy Size: 2 oz. Stone Grey (add $9.97) 4 oz. Stone Grey (add $12.97) Two Little Fishies AquaStik 2 Part Epoxy Underwater Putty 2 oz. or 4 oz. Stone Grey Details : AquaStik Stone Grey. 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. Can be sanded, molded, drilled and sawed.