Why choose our cat water fountain filters? 1.A triple filtration process: Each pet fountain filter is made up of a layer of cotton, activated carbon and an ion exchange resin.Healthier than others , there are only two filter materials. Triple-action purification can filter skin and debris, absorb odors, and soften water. 2.Better purification performance: Compared with most pet fountain filters on the market, the cat water fountain filter contains more activated carbon, which which allows you to obtain a better purification performance. 3.Keep your pet healthy: Cat water fountain filters can filter hair and debris, absorb odors and soften water. Improve the taste of the water and keep the water fresh. drink more and stay healthy. NOTE: Rinse the filter for 3-5 minutes with water before use, keep the filter completely wet, and then start cleaning and installing it. Keep the side flat up to ensure better filtration during installation. We suggest replacing it every 2-3 weeks to keep the