Florida Marine Research SFM55566 Reptiles Aquarium/Terrarium Gravel, 1-Pound, Green Aquarium and terrarium reptiles gravel is an attractive decoration to add sparkle in the substrate of the habitat Special long lasting gravel was developed just for hermit crabs Features coated and contains natural zeolites and bromilites to help control odors and absorb ammonia Available in green color This product weighs 1-pound