Pet Water Fountain Filters - Activated Carbon Replacement For Cats & Dogs. Keep Your Feline Companion Hydrated with Our Premium Cat Water Fountain Filters, Designed to Ensure Optimal Water Cleanliness. Specifically Crafted for 84oz/2.5L Round Cat Fountains, These Filters Incorporate an Advanced 3-layer Protection System. With a Cotton Layer, Activated Carbon, and Ion Exchange Resin, They Effectively Remove Hair, Heavy Metals, and Impurities, Delivering Fresh and Safe Water for Your Pet. By Enhancing the Water's Taste and Quality, Our Filters Encourage Increased Drinking, Helping to Reduce the Risk of Urinary Tract Infections and Supporting Your Cat's Overall Well-being. Key Features: - Compatibility: Designed for 84oz/2.5L Round Cat Fountains. - 3-Layer Protection: Includes Cotton, Activated Carbon, and Ion Exchange Resin. - Health Benefits: Improves Taste and Safety, Encouraging Hydration. - Replacement Schedule: Soak and Rinse Before Use; Replace Every 1-2 Weeks in Summer and 2-4 Weeks in Winter. Adjust Frequency for Households with Multiple Pets. Ensure Your Cat Stays Healthy and Hydrated with Our High-quality Filters, Providing Them with Fresh and Safe Water..