Aqueon Replacement Filter Cartridges Medium 3pk

Patented Aqueon dual-sided dense-floss cartridges contain over 25% more activated carbon than the leading brands. These unique cartridges were designed to ensure even distribution of carbon throughout for more thorough filtration and longer cartridge life.
High quality activated carbon keeps water clean
Align cartridge bottom key slot for an accurate fit inside the filter
Rinse under water to remove carbon dust before replacing
For optimal performance, change approximately every 4 to 6 weeks
Do not clean Bioholster when replacing the cartridge as it contains beneficial biological bacteria