The texture and grade of this aragonite makes it the perfect choice for the marine hobbyist looking for the most natural looking sand bed for their aquarium. It provides a wide variety of grain sizes of both sand and shells. Great for pistol shrimp - watchmen goby combos. This substrate is also commonly used for African Cichlid aquariums due its pH buffering capacity, and it's light color helps to promote the vibrant colors of any fish; marine or african cichlids. Heavy weight shipping charges apply.