The Drinkwell® 360 Replacement Filters, designed specifically for Drinkwell® 360 Fountains, ensure your pet's water stays clean and fresh. These cylindrical filters, each with a convenient pull-tab for easy handling, are equipped with granulated carbon for thorough and long-lasting filtration. Additionally, the duo-density polyester pad efficiently captures debris. Regular replacement of these filters, recommended every 2 to 4 weeks, not only maintains the quality of your pet's drinking water but also prolongs the life of your fountain. The continuous water circulation provided by these filters helps prevent bacterial growth between cleanings.