Fluval Sea Aquatic Epoxy is designed for use in freshwater and marine aquariums. The epoxy bonds and cures underwater, providing exceptional stability and strength in aquascaping applications, including rock structures and coral mounts. Completely cures in 24 hours in water and in 48 hours out of water. Non-toxic and safe for aquatic plants, fish, and reptiles. It can also be used in ponds, paludariums, reptile and small animal habitats.