Product Details Contains 75% less plastic compared to our original filter cartridge! Set of 2 or 6 filters Active carbon helps remove odors and impurities Ion exchange resin softens tap water to help prevent urinary tract disease Mesh filters out hair, sediment and debris For use with Catit Flower Fountains (This product is not designed to cure any disease or illness.) Instructions Nutritional Information For your cat’s health! Removes magnesium and calcium from tap water. These minerals can accumulate in your pet’s lower urinary tract and lead to urinary tract diseases, which is a common health issue for cats. The 3 steps of Triple Action filtration 1. Active Carbon removes odors and impurities. 2. Softens tap water to help prevent urinary tract disease, which is a common health issue for cats. 3. Filters out hair, sediment and debris. How to use Replace filters every 30 days, or sooner if the filter is visibly saturated. Multiple pet use may require more frequent changes.