About This Item BRAND NEW IN THE BOX NEVER USED Details Designed specifically for Catit drinking fountains, these filters have active carbon that removes odors and impurities. Prevents debris like dust, dirt and hair from winding up in your cat's stream—so she has a cleaner, yummier water flow. Ion exchange resin softens tap water, removing magnesium and calcium, to help prevent urinary issues. Multiple filters come per-pack, giving pet parents a better, longer-lasting value. Clean, odorless and tasty water may help entice fussy drinkers to stay hydrated. Go with the flow and keep the water in your pet fountain fresh with the Triple Action filter from Catit. These filters are specifically designed for Catit's pet fountain, and work to remove bacteria and chlorine odors while filtering out debris—so your pets aren't served a side of dust, dirt or hair with their beverage. And they help to soften materials found in tap water, like magnesium and calcium, to help prevent urinary tract diseases and infections. So, your pal's water is always clean, tasty and safe to drink!