Fish Gear Glowing Stone Aquarium Ornaments (8pc.). The glowing ornaments lighten your beauty, it absorbs energy from sunlight or other light sources and can illuminate themselves in the dark. It is a good decoration for fish tank, flower bed, fairy garden, pathway, pond, or driveway. These luminous stones absorb energy from sunlight or other light sources and can illuminate themselves in the dark. If the brightness is not enough, please use light again. They are safe to use for any decoration or scene. Be careful! The pebbles however are small enough to be choking for small children. Features: Appears to glow under LEDs Includes: 8 Ornaments Caution: Never use soap or detergent on any items placed in your aquarium, as they are highly toxic to fish. Advice for Use: Rinse in warm water before placing in aquarium. Be sure ornaments are the appropriate size for your fish.