A unique activated carbon, Seachem's Matrix carbon is formed as a spherical bead for optimum hydrodynamics, and will not pack. Permitting maximum water flow and contact with high density of macropourus binding sites, it is an advanced formula for hobbyists. 

Matrix carbon has the capacity to rapidly remove organic matter in your aquarium and does not rise above pH 7.0 even when added to distilled water.

Matrix carbon features:

High efficiency spherical carbon
Very little impact on pH due to low ash content
Lowest leachable phosphate level on market
High removal capacity; large surface area

Seachem Matrix Carbon