PURA Amazon Filter Media by Magnavore. **** PRODUCT INFORMATION **** **** PRODUCT MANUAL **** PÛRA Amazon Media is a 100% natural forest product that produces "black-water" - a rich assortment of health promoting natural protective substances and slowly but constantly leaches them right into the aquarium. The result is a rich golden colored water filled with natural organic compounds that sooth, revitalize, stimulate and protect the health of both tropical fish and plants. PURA Amazon releases enzymes that stimulate and promote root development in aquarium plants and cutin monomers that boost plants' immune response. With stronger roots, plants grow better and assimilate nutrients more efficiently. Convenient to implement, comes with a 6" x 12" 300-micron media bag.