Introducing replacement foam pre filters for Drinkwell 360, Lotus, Avalon, Pagoda & Sedona pet fountains! These convenient and easy-to-use pre filters help remove debris from your pet's water to keep it clean and healthy. The activated carbon filter helps reduce bad tastes and odors while the polyester filter catches hair and other larger particles. With these replacement foam pre filters you can get all the benefits of a cleaner fountain without having to buy a new one! Keep your furry friends hydrated with fresh filtered water every time they take a drink.