Estes Stoney River Premium Aquarium Sand Black 5 lb provides a sleek, natural look for both freshwater and marine aquariums. This non-toxic, pH-neutral substrate is safe for all aquatic life and won't alter water chemistry, making it ideal for planted tanks, reef systems, or community setups. With its fine, uniform grain size, Estes Stoney River Premium Aquarium Sand enhances water clarity, prevents detritus buildup, and offers a low-maintenance option for aquarists seeking a clean black substrate. Each 5 lb bag comes pre-washed and ready to use, delivering both beauty and function in one convenient package.