Each box contains 12 independently packaged filter cartridges and sponges made by PP cotton and sponge materials, designed a multi stage filtration process to effectively pet hair and impurities while improving water purity For optimal, soak the activated carbons filter a separate bowl for 5 minutes, rinse for 30 seconds to remove surfaces carbons, and replace every two weeks alongside cleaning the fountain pumps to sustains good filtration Perfectly compatible the 108 / 3.2L pet water fountain, this replacement filter cartridge features a triple filtration including cotton layer, activated carbons, and exchange resin to remove odors, soften water, and enhances taste and for your pet ' s drinking water Used home environments, this filter integrates seamlessly into pet water fountains to make sure a continuous supply by purified water, contaminants from entering the reservoir and promoting daily hydrations health Ideal for pet owners, particularly those cats or dogs, seeking to provide their furry cleaner, drinking water through regular filter maintenance and replacement