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 models (not compatible with Mini Fountain). Excellent Triple Filtration - The cat water fountain filters are filled with premium fiber cotton, activated carbon, and ion exchange resin, providing triple-action filtration to capture pet hair and food debris, reduce impurities and particles, remove odors, filter heavy metals, and soften tap water for cleaner, fresher drinking water. Upgraded Structure with Denser Filter Cotton - Increased filter holes and expanded filter surface area allow for faster water flow and more thorough filtration, improving removal of contaminants and helping maintain clean, fresh water. Supports Your Cat's Health - By reducing odors and impurities, minimizing the buildup of minerals, and lowering the risk of urinary tract issues, these replacement filters help provide fresh, clean water to encourage proper hydration and support overall feline health. Recommended Replacement Schedule - 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 or heavy usage, more frequent changes are advised.