Seachem Matrix 500ml
Controls ammonia, nitrite and nitrate

Matrix is a highly porous media designed to provide exceptionally efficient biofiltration for single sire removal fo ammonia, nitrite and nitrate from freshwater, marine and reef aquaria. Each litre of Matrix provides over 700m2 of surface, equivalent to over 170L of typical plastic ball media! Use with Stability to more rapidly establish the bio-filter.
DIRECTIONS
Use 1L of Matrix for each 400L of water. Matrix may be placed in any kind of filter, and is particularly effective in a caniter filter. Matrix is sufficiently large that no filter bag should be required for most applications. Matrix works well in drip tray systems, but you may find that the larger Pond Matrix is better suited for such applications.
500ml treats 200L