【Compatibility】This pet water fountain filter Fit for 1/2 Gallon, 1 Gallon, 2 Gallon, Petsafe, Drinkwell, Pagoda, Avalon, Creekside, Seascape, Sedona, Seaside, Butterfly Pet Cat Water Fountains. Please check the model of your fountain before purchasing. 【Multi-stage Filtration System】Baofum cat fountain filter consists of cotton layer, activated carbon and ion exchange resin, which effectively filters out hair and heavy metals, improves water quality and enhances taste. 【Pre-Filter Sponge】The cat fountain filter replacement includes 8 filters, 8 pre-filter sponges. The high-density pre-filter sponge can better filter hair and debris, preventing clogging and damage to the pump, and prolonging the life of the fountain pump. 【Promoting Health】Clean water quality encourages pets to drink more and increase their water intake, which helps reduce the risk of urinary tract infections and protects their health. 【Regular Replacement】To avoid activated carbon particles falling out, soak in water for a few minutes and rinse well before use. We recommend changing your pet fountain filter replacement every 2-4 weeks! 【Friendly Customer Service】We provide 12 months of free replacement for quality issues and 24-hour customer service. Please feel free to contact us if you have any questions. Introducing our Cat Fountain Filters, designed with a multi-stage filtration system to provide clean and fresh water for your beloved pets. Our filters consist of a cotton layer, activated carbon, and ion exchange resin, which work together to effectively filter out hair and heavy metals, improving water quality and enhancing the taste. Not only does our filtration system ensure cleaner water, but it also promotes the health of your pets. By increasing their water intake, it can help reduce the risk of urinary tract infections and other related health issues. Replacing the filter is a breeze. Simply remove the old filter and replace it with a new carbon filter when you clean your pet's fountain. We recommend replacing the filter every 2-4 weeks to maintain optimum performance and water quality.