General description Fresh, running water is preferred by your furry friends all day long, making this replacement filter highly recommended for families with pets. It is designed specifically for the Homerunpet Wireless Pet Fountain (Model: WF20) and ensures clean drinking water for your pets. Technical specifications Compatibility: Only works with Homerunpet fountains Available in: 3-Pack or 6-Pack Filtration: Triple Filtration system Filter composition: Coconut shell activated carbon sandwiched between two layers of cotton mesh Usage After unpacking, soak and rinse the filter for 2 minutes in water Recommended replacement: Every 30 days, depending on pet usage