Keep Your Pet's Drinking Water Clean: Foam filters prevent food, hair and other debris from circulating around the fountain, providing your pet with cleaner, healthier water. Improved Overall Filtration: This pet fountain replacement filter keeps pets hydrated, which is a simple way to improve their health, drinking clean, fresh water has many benefits for cats and dogs.dogs, adding more fun times, you and your pet can enjoy more playing time and live happily together Easy to replace: Pump cleaning and foam filter replacement is easy to remove, we recommend replacing it every 2-4 weeks to maintain your pet water housing and keep the water freshand clean Wide Usage: This pet fountain foam is compatible with Drinkwell 360, Lotus, Avalon and Pagoda stainless steel fountains, helping to extend the life of the fountain water pump. Package Includes: You will receive 24 replacement foam filters, we have upgraded the thickness and density of the product