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 models. It is not compatible with the Mini Fountain. Excellent Triple Filtration - The cat water fountain filter is filled with premium fiber cotton, activated carbon, and ion exchange resin, providing triple-action filtration to capture pet hair and food debris, remove impurities and particles, reduce heavy metals and odors, and soften tap water for clean, fresh drinking water. Upgraded Structure with Dense Filter Cotton - Increased filter holes and expanded filter surface area allow for faster and more thorough water filtration. Enhanced filtration efficiency helps maintain cleaner, fresher water for your pet. Supports Your Cat’s Health - By reducing impurities, eliminating odors, and softening minerals, these replacement filters help provide clean, great-tasting water, promoting proper hydration and supporting urinary tract health. Regular Replacement Recommended - To minimize carbon dust, soak the replacement filter in water for 5–10 minutes before use and rinse thoroughly under running water. Replace every 1–2 weeks in summer and every 2–4 weeks in winter. For multi-cat households, more frequent replacement is advised.