Seachem Matrix 4 L – Premium Biological Filter Media for Large Aquariums & Ponds

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About this product

Maintain perfect water quality in even the largest aquariums and ponds with Seachem Matrix 4 L , a high-capacity biological filtration media designed to house vast colonies of beneficial bacteria. Matrix is a porous inorganic biomedia with an enormous surface area — over 700 m² per litre — providing space for both aerobic and anaerobic bacteria. This dual-action process helps break down ammonia, nitrite, and nitrate , resulting in crystal-clear, stable water and a healthier environment for your fish and plants. The 4-litre pack is ideal for large freshwater or marine aquariums , sumps , or pond filtration systems , offering long-term performance without the need for frequent replacement. Key Features: High-porosity biological media made from natural inorganic rock Provides both aerobic & anaerobic zones for complete nitrogen cycle filtration Extremely durable – does not break down or need frequent replacement Safe for freshwater, marine, and pond environments Treats up to 3,200 L (850 US gal) of water per 4 L container Compatible with canister filters, sumps, internal filters, or trickle towers Usage Instructions: Use 250 mL per 200 L (50 US gal) of water Rinse gently in aquarium w

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