Seachem Matrix - 1 Litre Seachem Matrix - 1 Litre is a high-porosity biological filtration media for freshwater and saltwater aquariums, providing extensive surface area for beneficial bacteria that process nitrogenous waste. Seachem Matrix for Aquarium Biofiltration Matrix is a porous inorganic biomedia with both external and internal macroporous surface area. These pores support nitrifying and denitrifying bacteria, allowing Matrix to help process ammonia, nitrite, and nitrate in the same filter system. High-Porosity Biomedia Benefits Provides efficient biological filtration for freshwater and saltwater aquariums. Supports beneficial bacteria that process ammonia, nitrite, and nitrate. Each litre provides more than 700 m2 of surface area. Inert media will not break down and does not need routine replacement. Large media size usually does not require a filter bag in most applications. Can be rinsed when needed because much of the bacterial population is internal. Seachem Matrix Biological Media Details Product type: Porous biological filtration media Primary use: Aquarium biofilter support and nitrogenous waste processing Suitable systems: Freshwater and saltwater aquariums Media size: Approximately 10 mm diameter Dosing reference: 250 ml per 200 L (50 US gallons) Package size: 1 Litre Directions for Seachem Matrix Use 250 ml of Matrix for each 200 L (50 US gallons) of aquarium water. Place in any filter where water can pass through the media; canister filters are especially effective. A filter bag is not usually required due to the larger media size, though one may be used if needed for easier handling. Use with Seachem Stability to help establish the biofilter more quickly in new or disturbed aquariums. What's Included 1 x Seachem Matrix - 1 Litre