Create the perfect foundation for your planted aquarium with Fluval Bio Stratum Aquarium Substrate. This 17.6 lb bag is made from 100% natural, mineral-rich volcanic soil from Mount Aso in Japan and infused with beneficial nitrifying bacteria for immediate biological activity. Its non-compacting 1 mm granules let even the tiniest plant roots spread easily while absorbing essential nutrients, minerals, and trace elements to promote vigorous growth and overall plant health. Beautiful, thriving aquascapes start from the ground up with Bio Stratum.
