6/8 Pack Cat Water Fountain Filter Compatible with Catit Compatibility for Catit Fountain Filters - Our fountain filter is compatible with Catit Design Senses Fountain, Flower Fountain, Senses 2.0, and Fresh & Clear Stainless Steel (not compatible with Mini Fountain). Excellent Triple Filtration - The filters for cat water fountain are filled with premium fiber cotton, activated carbon, and ion exchange resin, providing triple-action filtration to isolate pet hair and food residue, remove impurities and particles, filter heavy metals and odors, soften tap water, and deliver clean, fresh water. Upgraded Structure + Dense Filter Cotton - Increased filter holes and filter surface area allow faster and more thorough water filtration. Enhanced removal of impurities helps keep water clean and fresh. Supports Your Cat's Health - By reducing odors and impurities, helping minimize the risk of urinary tract issues, and softening minerals, these cat water fountain filters provide clean, fresh drinking water to help keep your cat healthy and hydrated. Regular Replacement Recommended - To remove loose carbon dust, soak the replacement cat water fountain filter in water for 510 minutes and rinse thoroughly under running water before use. Replace every 12 weeks in summer and every 24 weeks in winter. For multi-cat households, more frequent replacements are recommended.