LESYPET Glow in The Dark Conch Shell for Fish Tank, Luminous Conch Shell, Assorted The light could glow in the dark for more than 6-10 hours after absorbing the sunlight/lamplight in the daytime Designed for use in Fish Tanks, Pools, & Ponds. Can also be used for Gardens and Home Plant pots Water, acid and alkali resistant, antioxidant Conch & Shell style, perfect for decoration. Random color, 30 Pcs