PetSafe Drinkwell Replacement Carbon Filter - 48 Total Filters (12 Packs with 4 Filters per Pack) 48 Total Filters (12 Packs with 4 Filters per Pack) Compatible with PetSafe Drinkwell Avalon, Pagoda and Sedona Pet Fountains Removes bad tastes and odors from the water, keeping it fresh ctivated carbon water filter made from organic coconut shells Using water filters will extend the life of your fountain