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