Seachem Matrix is a high-porosity biological filtration media designed to provide efficient biofiltration for the removal of nitrogenous waste in freshwater, marine, and reef aquariums.
 High Surface Area: Extremely porous macroporous solid structure offers over 700 m² of surface area per liter, far exceeding plastic bio-rings.
 Comprehensive Waste Removal: Supports both aerobic nitrifying bacteria (to eliminate ammonia and nitrite) and anaerobic denitrifying bacteria within its deep internal structure (to reduce nitrates).
 Chemically Inert: Completely natural, inert stonelike substrate that will not impact water chemistry, pH, or hardness.
 Low Maintenance: Long-lasting bio-media that does not break down or require frequent replacement; gentle rinsing in tank water removes detritus without destroying beneficial bacterial colonies.
 Universal Compatibility: Suitable for use in canister filters, sump systems, wet/dry filters, trickling filters, and top/box filters.