The Catit Flower Fountain Triple Action Filter Pad filters out debris, removes odours and impurities. Softens tap water by reducing magnesium and calcium. These minerals accumulate in your pet's lower urinary tract and can lead to urinary tract diseases, which is a common health issue for cats. This product is not designed to cure any disease or illness. Available in packs of 2 or 6 Contains 75% less plastic compared to the original filter cartridge Active carbon helps remove odours 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 Replace the filter pad every 30 days for cleaner, better tasting water! Compatible With: Catit Flower Fountain, Catit LED Flower Fountain, Catit Stainless Steel Flower Fountain Available Sizes: 2-Pack / 6-Pack