Seachem Media Matrix Aquarium Filter Media Size:1L but they also offer fresh

but they also offer fresh air and peace of mind

If using pads in the tray

Helps prevent bloat

no more bleeding gums

XS: 10cm x 5cm x 4

Seachem Media Matrix Aquarium Filter Media Size:1L but they also offer freshThe Seachem Media Matrix Aquarium Filter is a high porosity biomedia that provides efficient nitrogenous waste removal via biofiltration. Matrix is a porous inorganic solid with a diameter of about 10 mm. Each liter of Matrix has the same surface area (>700 m2) as 170 liters of plastic balls! Plastic bio materials only have an external surface area, whereas Matrix has both an external and an internal macroporous surface area. These macropores are