Does Not Need to be Rinsed Attractive Small Black Substrate Convenient 1lb Package Activ Betta Bio-Activ Gravel is a natural aquarium substrate. This black substrate is safe for all freshwater aquariums, including planted tanks. Bag contains 1 lb of substrate. Pour entire contents of bag into aquarium and fill with dechlorinated water. Color & Size: Black, grain size 1.5 - 3.1mm
