The Dogit Design Alfresco Drinking Dog Water Fountain Cartridge Filters are foam/carbon filters to be used with the Dogit Alfresco Dog Water Fountain. The filters collect debris, food, hair, and sediment. Activated carbon absorbs water impurities, ensuring your dog or cat is drinking fresh and clean water. It is recommended that you replace the filter once a month. The Dogit Alfresco Drinking Dog Water Fountain with Triple Action Filtration responds to your pet's need for a continuous supply of fresh and clean drinking water. The re-circulating water flow eliminates stale, stagnant water to provide fresh, filtered dog water with a multitude of inherent dog health benefits. The automatic dog water dispenser is elevated to provide a better drinking position-ideal for large breeds, older dogs or dogs with arthritis, muscle, and joint problems. Encouraging your pet to drink more water helps ensure proper kidney function. This pet water dispenser comes with one Triple Action Filter. The dog water bowl dispenser is made from BPA-Free materials and is easy to clean. You can also use this product as a cat water fountain, for your kitty to have access to fresh, clean water! To complete your dog feeding station (or cat feeding station) pair this item with dog food dishes and a dog water mat. Dogit has developed a wide variety of dog supplies and products. Some of the other products include dog toys, dog beds, dog harnesses, dog food, dog collars, dog treats, dog leashes, dog crates, dog bowls, dog gates, dog bones, dog water bowl dispensers, dog food bowls and other dog accessories.