"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."
