Catit PIXI Water Fountain Replacement Filters for PIXI Cat Fountains are available in both a 3 and 6-Pack and is a replacement filter compatible with Catit PIXI drinking fountains, containing triple-action filter cartridges. Each filter is composed of cotton mesh to catch debris, active carbon to remove odors and impurities, and ion-exchange resin to soften tap water by reducing magnesium and calcium. Regularly changing the filter (about once a month) ensures your cat’s fountain water remains clean, clear, and free of chlorine and heavy metals. Offers several month supply per 3-Pack or 6-Month supply for the 6-Pack supply of filters, keeping your PIXI fountain performing optimally. They’re easy to swap in and out, and by maintaining the fountain’s filtration, you help encourage your cat to drink more by providing them with pure, great-tasting water every day.