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
![Aqueon QuietFlow E Replacement Filter Cartridges Small 3pk Aqueon QuietFlow E Replacement Filter Cartridges Small 3pk](https://cdn11.bigcommerce.com/s-ldfio/images/stencil/500x659/products/3913/184797/original__16649.1721073882.jpg?c=2)