CaribSea Super Naturals “Gemstone Creek” Gravel (40 lb) – A naturally colored aquarium gravel blend designed to replicate a sparkling creek bed. This substrate’s smooth, rounded granules have a mix of tans, grays, and translucent quartz-like pebbles that beautifully reflect light underwater. Completely inert and free of dyes or coatings, it won’t affect water chemistry. Gemstone Creek gravel provides a decorative, fish-safe floor for freshwater aquariums, supporting plant roots and beneficial bacteria while giving tanks a vibrant, polished look.