Features: Package Contains: You can get 300 pieces of glowing rocks in the package, ample quantity and rich colors allow you to put them in your fish tank to create a beautiful and romantic scene. Safe to Use: The glow in the dark rocks are made of quality material, safe and nontoxic, nonradioactive and tasteless, will not do harm to human body, fish and animals in the fish tank or aquarium, you can apply them for decoration with confidence. Wide Usages: The glow in the dark stones will be beautiful decorations indoors and outdoors; You can place them in your fish tank, aquarium, swimming pool, pond, turtle tank, or use them to decorate sidewalks, paths, driveways, flower beds, potted plants in your lawn, patio, garden, glowing visual effect will make the space more attractive and charming. Methods for Use: Let pebbles for fish tank absorb enough sunlight or artificial light before use, then put them anywhere you want to spice up, these pebbles will glow brightly in the dark and last about 3-5 hours, convenient and effortless; You can also send them as gifts for your family and friends, adding colors to their life. Warm Tips: The decorative rocks need to be spread out when absorbing sunlight for longer glowing time and better glowing effect; The outdoor decorative rocks are small, and need to be played with under adult supervision to prevent young children who under 6 years from ingesting them. Notice: Actual color may be slightly different from the image due to different display an effect. Please allow 1-3cm deviation due to manual measurement. Specifications: Material: Plastic Size: 8*11mm Weight: 155g Color: Multicolour,Blue,Green Include: 300 * Luminous Pebble Stone