Seachem Matrix

Seachem Matrix

  • High porosity biomedia for efficient biofiltration
  • Both external and internal macroporous surface area
  • Completely inert and will not breakdown
  • Grain: approx. 10 mm
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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.


  • High porosity biomedia for efficient biofiltration
  • Both external and internal macroporous surface area
  • Completely inert and will not breakdown


Use 250 mL of Matrix for each 200 L (50 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.

This dosage may differ from your packaging. Based on updated studies, Matrix was found to treat even more water than previously asserted.



Seachem is a renowned manufacturer of aquarium fertilisers and water conditioners. For over 40 years, hobbyists and professionals have benefited from the innovative products. A wide range of aids such as Seachem Purigen or Seachem Matrix ensure crystal-clear water in the aquascape. Biological water conditioners for the aquarium are also offered with products such as Seachem Stabilty are also offered.

General information

Item no.
EAN 000116011105
Weight 20,10 kg
Shipping weight 23,10 kg

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Customer reviews

This item has been rated 4.2 out of 5 stars
5 Reviews
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5 Stars(3)
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3 Stars(2)
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1 Star(0)
Miguel D.
The best Media for Filters
20th May 2020
Seachem - Matrix - 4.000 ml
Seachem - Matrix - 4.000 ml

I used a lot of different medias already, from the basic ones that come with filters, to top brands like ADA, and this is my top media since I tested it, lasts for long, it... (read more)

asen a.
great product
3rd May 2020
Seachem - Matrix - 250 ml
Seachem - Matrix - 250 ml

Best filter media there is, simple as that. A bit pricey, but its deffinitely worth it. I wouldnt trust the label tho, 250ml for 200l water is way off.

Lorenzo P.
Very good media for tour filter
17th September 2019
Seachem - Matrix - 2.000 ml
Seachem - Matrix - 2.000 ml

Probably One of the best filter media,make the work very well! 1lt Is enough for 150/200 LT tank. Very good!

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