Carib Sea SCS05800 Reptiles Full Moon Glow in The Dark Sand, 5-Pound Full moon glow in the dark sand creates a unique and eerie environment for desert dwelling reptiles and arachnids Made of aragonite, the most soluble form of calcium carbonate Features beautiful white color when the lights are on and a soft glow when the lights go out Finely graded for low impact risk It weighs 5-pounds