Seachem Matrix

Matrix™ is a high porosity biomedia that provides effective biofiltration for the removal of nitrogenous wastes. Matrix™ is a porous inorganic solid approximately 10mm in diameter. Each liter of Matrix™ provides as much surface area (>~700 m2) as 170 liters of plastic balls! Plastic biomaterials only provide an external surface, while Matrix™ provides an external and internal macroporous surface. These macropores are ideally sized for the support of nitrifying and denitrifying bacteria. This allows Matrix™, unlike other forms of biomedia, to remove nitrates along with ammonia and nitrites, simultaneously and in the same filter.

Matrix™ is completely inert and will not decompose. It does not need to be replaced. Since the majority of bacteria are internal, Matrix™ can be rinsed out as needed without damaging the filter. Matrix™ is compatible with all types of wet or wet-dry filters.