- Perfect Compatibility: Designed exclusively for 2.0 and 3.0 series cat fountains, this filter fits 1.85L pet water fountains perfectly. Ensure you check the size and shape before ordering for optimal performance. - Value Pack: Each package contains 8 individually sealed cat fountain filters, providing you with an affordable supply for all your replacement needs. - Superior Filtration: Featuring a double-layer filtration system, the high-density cotton layer efficiently traps hair and debris. The activated carbon, coconut shell, and ion exchange resin work together to eliminate impurities, heavy metals, and odors, ensuring your pet enjoys clean, fresh water throughout the day. - Easy Preparation: For best results, soak the filter in water for 10 minutes and rinse under running water before use. This prevents carbon dust or resin from contaminating the water. To maintain water quality, replace the filter every 2-3 weeks. - Practical Applications: Ideal for homes with multiple pets, this filter keeps water clean and appealing, encouraging your pets to stay hydrated. Perfect for busy pet owners who want a hassle-free way to ensure their pets have access to fresh water at all times.