Seachem Matrix 1L

Matrix™ is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste. Matrix™ is a porous inorganic solid about 10 mm in diameter. Each liter of Matrix™ provides as much surface (>~700 m2) as 170 liters of plastic balls! Plastic bio-materials provide only external surface area, whereas Matrix™ provides both external and internal macroporous surface area. These macropores are ideally sized for the support of nitrifying and denitrifying bacteria. This allows Matrix™, unlike other forms of biomedia, to remove nitrate along with ammonia and nitrite, simultaneously and in the same filter.

Matrix™ is completely inert and will not breakdown. It need not be replaced. Since the majority of the bacteria are internal, Matrix™ may be rinsed when needed without damaging the filter. Matrix™ is compatible with all types of wet or wet-dry filters.


  • Great for upgrading your old filter media
  • Easy to clean
  • Can be used in multiple types of filters like canister filter, top filters, sump filters
  • Highly porous media with a large surface area perfect for colonising nitrifying bacteria.

Use 500 mL of Matrix™ for each 200 L (50 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.

Sizes Available

100 mL, 250 mL, 500 mL, 1L, 2L, 4L, 20L and 100L


Brand Seachem
Model # 117
Barcode # 000116011709
Shipping Weight 0.8000kg