Remove Nitrate, Ammonia and Nitrite at Once Most biomedia only handles ammonia and nitrite, leaving nitrate to climb and stress your fish. Plastic bio-balls waste filter space with almost no usable surface for beneficial bacteria. Matrix is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste. Each porous inorganic bead delivers both external and internal macroporous surface, so a single liter offers as much surface (greater than roughly 700 square meters) as 170 liters of plastic balls. Those macropores are ideally sized to support nitrifying and denitrifying bacteria, letting Matrix remove nitrate along with ammonia and nitrite simultaneously in the same filter, something other biomedia cannot do. Matrix comes from Seachem Laboratories, the chemistry-driven company founded in 1979 in Madison, Georgia, where filtration media are developed in-house by chemists. That science-first focus is why Matrix delivers such an enormous, high-capacity porous surface area for biological filtration, packing years of effective bio-filtration into media that stays inert and does not need replacing. Add 250 mL of Matrix for every 100 L (25 US gallons) of water. Place it in any filter, ideally a canister filter, with no filter bag needed for most applications. Pair with Stability to establish the bio-filter faster, and rinse only when needed without harming the colony. Build a filter that finally controls nitrate. Add to cart. What It DoesMatrix is a high porosity biomedia, a porous inorganic solid about 10 mm in diameter, that provides efficient biofiltration for the removal of nitrogenous waste. Each liter provides as much surface (greater than roughly 700 square meters) as 170 liters of plastic balls, offering both external and internal macroporous surface area sized to support nitrifying and denitrifying bacteria. This lets it remove nitrate along with ammonia and nitrite simultaneously in the same filter. Matrix is completely inert, will not break down, and need not be replaced. Because the majority of the bacteria are internal, it may be rinsed when needed without damaging the filter, and it is compatible with all types of wet or wet-dry filters. BET surface area measurements indicate Matrix contains nearly 10 times the specific surface area of Substrat Pro and more than 20 times that of MicroMec, with an estimated 4 to 4.5 times the biologically active surface area of Substrat Pro and 8 to 9 times that of MicroMec. DirectionsUse 250 mL of Matrix for each 100 L (25 US gallons) of water. Matrix may be placed in any kind of filter, and is particularly effective in a canister filter. Matrix is sufficiently large that no filter bag should be required for most applications. Matrix works well in drip tray systems, but you may find that the larger Pond Matrix is better suited for such applications. Use with Stability to more rapidly establish the bio-filter. Available Sizes250 mL, 500 mL, 1 L, 2 L, 4 L Why Seachem Matrix Controls all three nitrogenous wastes: its internal macropores host denitrifying bacteria, so it removes nitrate alongside ammonia and nitrite in the same filter, which most biomedia cannot do. Massive high-capacity surface area: a single liter provides as much surface (greater than roughly 700 square meters) as 170 liters of plastic bio-balls, thanks to both external and internal porosity. Inert and long-lasting: it is completely inert, will not break down, and need not be replaced, so it keeps working for the life of the tank. Filter-friendly and low-maintenance: compatible with all wet or wet-dry filters, especially canisters, and large enough that no filter bag is required for most applications; because most bacteria live internally, it can be rinsed without damaging the colony. Best ForFreshwater and marine aquariums, particularly canister-filtered setups, where controlling nitrate as well as ammonia and nitrite matters. An excellent choice for aquarists who want maximum biological capacity in a compact, reusable, maintenance-friendly media. FAQ How long does it last, and does it need replacing? Matrix is completely inert, will not break down, and need not be replaced. Because most of the bacteria are internal, it can simply be rinsed when needed without damaging the filter. Where does it go in my filter? Use 250 mL for each 100 L (25 US gallons) of water. It can go in any filter and is particularly effective in a canister filter; it is large enough that no filter bag is required for most applications. Freshwater or marine? Both. Matrix is compatible with all types of wet or wet-dry filters and works in freshwater and marine systems.