Replacement Filter For Stainless Steel Cat Water Fountain, 8 PACK Pet Water Fountain Filter Package Includes: 8 * Replacement Carbon Filters Friendly Suggestions: 1. Please change the filter and clean the fountain regularly. 2. A full cleaning can be done every two weeks, which will ensure water quality. 3. Depending on actual use, filters should be changed or cleaned every 2 to 4 weeks. - Match: Our cat water fountain filters compatible with 84oz/2.5L stainless steel cat water fountain and 67oz/2.0L cat water fountain. - Four-Stage Circulating Filtration System: The cat fountain filters is composed of high-quality activated carbon and ion exchange resin to form a four-layer filtration system, they can filter hair and residue, absorb odors, soften water and achieve good purification performance. - Healthy and Safe Material: The replacement filters are made of environmentally friendly materials that help ensure water quality and provide healthy and pure water to protect your pets health. - Friendly Recommendations: Rinse the cat carbon filter with water thoroughly before use, then install the cat fountain filter into the cat drinking water fountain. (Note: Change a cat fountain filter after using 2 to 4 weeks to keep water running fresh and clean.) - After-sale service: NautpyPaws is committed to providing our customers with products that meet quality standards and an excellent buying experience. If you are confused about any of our products, please feel free to contact us and we will get back to you within 4 hours.