Seachem Matrix
Matrix is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste. It is a porous inorganic solid about 10mm in diameter. Matrix offers both external and internal macroporous surface area. These macropores are ideally sized for the support of nitrifying and denitrifying bacteria, enabling the removal of ammonia, nitrite, and nitrate simultaneously.
Product Specifications
| Feature | Detail |
|---|---|
| Material | Inorganic porous solid |
| Size | 10mm diameter |
| Surface Area | External and internal macroporous |
| Function | Biofiltration for ammonia, nitrite, and nitrate removal |
FAQ
How does Matrix support bacterial growth?
Matrix provides a large surface area with macropores that are ideal for nitrifying and denitrifying bacteria to colonize, supporting efficient biological filtration.
Can Matrix be used in both freshwater and saltwater aquariums?
Matrix is designed for use in freshwater aquariums and is effective in removing nitrogenous waste in such environments.
Is Matrix reusable after use?
Please contact customer service




Lillian Fisher –
I’ve used Matrix in my 55-gallon freshwater tank for over six months. The water quality has stayed stable, with no noticeable spikes in ammonia or nitrite. The media is easy to clean and maintain. I noticed a significant drop in nitrate levels after a few weeks of use.
Charles Wallace –
Matrix works well as part of my biofilter setup. It’s a solid choice for removing ammonia and nitrite. I haven’t had to replace it yet, and the surface remains active. A bit of rinsing after installation helps with initial settling.
Sebastian Simpson –
After switching from a standard filter media, I saw better water clarity and lower nitrate readings. The macropores support good bacterial colonization. I recommend it for any freshwater aquarium with high bioload.