Nyos Reef Cement is a quick-acting adhesive specifically designed for use in reef aquariums. This versatile cement binds stone structures firmly and cures completely within just two minutes, making it an essential tool for attaching coral frags or building intricate reefscapes both above and below water levels. The product is safe to use around corals and fish, allowing for natural overgrowth with coralline red algae while maintaining a strong bond.