Keep your furry friend's water fresh and clean with PetSafe Drinkwell Replacement Carbon Filters. These high-quality filters are exclusively designed for use in Drinkwell Pagoda pet water fountains (sold separately). The duo-density polyester pre-filter catches hair, debris, and sediment, while the activated carbon removes bad tastes and odors for a refreshing drink every time. Regularly changing the filter also helps prolong the life of the water pump.