[【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. 【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 cat 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.]