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 filter is 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 expanded filter area allow faster and more thorough water filtration, improving removal of impurities and maintaining clean, fresh water. Supports your cat's health - By reducing odors and impurities, helping minimize the risk of urinary tract issues, and softening minerals, these filters provide clean, fresh drinking water to help keep your cat hydrated and healthy. Regular Replacement Recommended - To reduce initial carbon dust, soak the replacement filter in water for 5–10 minutes and rinse thoroughly under running water before first use. Replace every 1–2 weeks in summer and every 2–4 weeks in winter. For multi-cat households, more frequent changes may be needed.