Efficient Cat Fountain Filter3-layer filtration mode and activated carbon filtration system trap hair, sediment and debris, remove water odor, soften water water, take care of your beloved pets. For Your Cat's Health Only the filter purifies tap water, so your cat always has clean drinking water. Better tasting water will encourage your cat to drink more, help replenish moisture and help maintain good health. High Quality Material and Safety for Large PetsThe fountain replacement filters are made of negative ions and activated carbon, always keep the water clean and safe. cool for your pets. Durable & Long LifeThe flower fountain filter lasts 3-4 weeks; Plastic case design, negative ions and activated carbon never leak, not easily deformed. 6 pieces for easy replacement The three-effect water filter lasts up to a month, so you can save money when taking care of your cat. However, if more than one cat uses the source, it should be replaced more frequently. The kit includes a pack of 6 filters that can be used from 6 months.