Aqueon Medium Replacement Filter Cartridges 6-Pack Dense Floss + Activated CarbonMedium Aqueon replacement filter cartridges (6 pack) with dual sided dense floss and 25% more activated carbon than leading brands. Rinse and install using FRONT tab. Key Bullet Points Medium replacement filter cartridges for Aqueon aquarium filters 6 pack value for routine tank maintenance Dual sided dense floss helps trap debris and particles 25% more activated carbon than leading brands for clearer water Easy install: rinse under cold water, use