Seachem Matrix (Options Available)

High capacity biofiltration Controls ammonia, nitrite, and nitrate Highly porous - enormous surface area (>~700 m2/L) Supports aerobic and anaerobic bacteria species Overview Matrix™ is a high porosity biomedia that provides efficient biofiltration for the removal of nitrogenous waste.
Matrix™ is a porous inorganic solid about 10 mm in diameter.
Each liter of Matrix™ provides as much surface (>~700 m2) as 170 liters of plastic balls!
Plastic bio-materials provide only external surface area, whereas Matrix™ provides both external and internal macroporous surface area.
These macropores are ideally sized for the support of 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.
Matrix™ is completely inert and will not breakdown.
It need not be replaced.
Since the majority of the bacteria are internal, Matrix™ may be rinsed when needed without damaging the filter. Matrix™ is compatible with all types of wet or wet-dry filters.