Marina Decorative Aquarium Gravel – Blue (1 lb) – A 1-pound bag of bright blue aquarium gravel that can be used to decorate the bottom of small tanks or as an accent in larger aquariums. The gravel is epoxy-coated to maintain its vivid blue color and to ensure it’s inert (so it won’t affect water chemistry). Using this gravel creates a colorful floor for your aquarium, enhancing its visual appeal and giving a striking contrast to green plants or brightly colored fish. It also helps anchor lightweight plants and ornaments in place.