Seachem Matrix

Matrix™ is a highly porous biological media that provides efficient biofiltration for the removal of nitrogenous waste. Matrix™ is a porous inorganic solid approximately 10 mm in diameter. Each liter of Matrix™ provides as much surface area (>~700 m2) as 170 liters of plastic balls! Plastic biomaterials provide only external surface area, while Matrix™ provides both external and internal macroporous surface area. These macropores are ideally sized to support 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.