Fluval Ultragrade Carbon is ideally suited as a fine water scrub and is best placed in the lowest or middle modules. By placing before any biologically specific media, it will strain and adsorb tiny particles, dissolved impurities and remove dyes, medications, and odors. Place the carbon in a filter bag or place a thin polyester padding over the grid to prevent falling through as Ultragrade Carbon is smaller than the Fluval Module bottom grid. Change carbon monthly. Rinse before use.
Please click on "More Information" for directions for use and maintenance.