if you are concerned about the health of your pet cats, this product is the best yet. It offers you a great but easy way to offer clean, circulating water to your small animals! <br><br>Each package includes 12 packs of filters for your long time use. <br>It help lock hair and debris, remove impurities in the water, minimize the threat of parasites, so that your cat/dogs can drink water more healthy. <br><br>Warm Tips: <br>You need to change a new one filter at least every mouth. <br>It's fit for flower pet fountains, but not fit for catit flower fountain. <br>Please rinse the charcoal filter thoroughly in cold water first before use to help remove any excess and loose charcoal dust. <br>