The Ion-X™ Pet Fountain Filters are expertly crafted to ensure your pet's water remains clean and fresh, contributing to their overall health and happiness. The unique dual filtration system combines the power of activated carbon and ion-exchange filters. The carbon filter diligently removes any bad tastes and odours, while the ion-exchange filter keeps the water soft, preventing mineral build-up. These filters are specifically designed for the PetSafe® Outlast™ Pet Fountain and Viva™ Pet Fountain, providing a perfect fit and ease of maintenance. With a simple replacement process, these filters are designed for convenience and effectiveness. Your pet deserves the freshest water possible. Trust PetSafe® to keep your pet healthy, safe and happy.