Glow In The Dark Gravel Photoluminescent Pebble Fluorescent Cobblestone Noctilucent Resin Stone For Fish Tank/Aquarium/Garden Trails Decoration 250 G (Blue-Green)

Non-toxic harmless non-radioactive strong environmental adsorption capacity Non-flammable non-volatile. No specific storage requirements. Polyresin mix with fluorescent metal oxide durable and long life High-intensive luminousexposed 1-30 minutes in light can glow in the dark up to 1-5 hours Long life timerepeatedly absorbing energy and emitting light for at least 3 years