Aqueon Replacement Filter Cartridges, Small, 3 Count

Cartridge contains high quality activated carbon that keeps water clean
Installs in seconds: rinse first and align cartridge bottom key slot for an accurate fit inside the Filter
Easy installation using the "FRONT" orientation tab
For optimal performance, change approximately every 4 weeks
Fits Aqueon QuietFlow Filter: E Internal Power Filter Size 10 and MiniBow Aquarium Filters Size 1, 2.5 and 5