PetSafe Drinkwell Carbon Replacement Filters, Keeps Water Clean & Fresh, Compatible with Multiple PetSafe Fountains, 4 pack, WhiteFRESH & FILTERED WATER: The activated carbon in the filter keeps your pets water clean by removing bad tastes and odours EASIER CLEANING: The duo density polyester pad in each filter catches hair and debris, making cleaning of the fountain easier BETTER VALUE: PetSafe filters contain 50% more carbon than generic brands for superior and longer lasting filtration LONGER FOUNTAIN LIFE: Filters help extend the life of your fountain and pump, and should be