Cat water fountain filter for NPET DF10/DF30 large pet water fountain,dog water fountain replacement filter. [MULTIPLE FILTERING SYSTEM] The cat fountain filter is made of high-density sponge and activated carbon, which can effectively filter hair and impurities and keep the water fresh. Provide fresh and clean water for your pet. [Package]There are 4 pet fountain filter replacement pieces, enough for your daily use and replacement filters for your cat water fountain. NOTE: To prevent activated carbon dust (which will not harm your pet) from being shed into the water, soak the pet water fountain filter in water for 3-5 minutes and rinse the cat water fountain filter replacement thoroughly under running water before use. [Replace Regularly]Suggest replacing dog water fountain filter every 2-4 weeks, please change it more often if your dog water fountain serve for multiple pets. [Tips]Please keep unused pet filters in a box in a dark place, Which will prevent filter from being oxidized and turn yellow. Cat water fountain filter 12 pack