Petmate Fresh Flow Replacement Charcoal Filter Black, Grey, 1 Each/2 Pack by Petmate

Product Description Petmate Fresh Flow Replacement Filters use charcoal to keep your pets water fresh and clean. The charcoal filter removes odors to keep water fresh and provide naturally cool and oxygenated water. Encourages your pet to drink more water and stay hydrated while helping to extend the live of your fountain. Works with all Fresh Flow fountains. Filters should be replaced every 30 days.