Wide Compatibility: Designed for 2.5Gal/9.5L large dog water fountains, these 18CM larger cat fountain filters your pet's water remains clean, fresh, and tasty. Ideal for pet owners seeking to maintain a healthy hydration environment for their pets. Triple Filtration System: Our replacement filters feature high-density cotton to trap hairs and debris, while the coconut activated carbon layer removes chlorine, odors, and improves taste. This combination helps reduce the risk of urinary and kidney issues in pets. Pump Protection: Each filter includes a high-density sponge that prevents debris and hair from entering the pump, thereby extending its lifespan. This protective measure ensures your fountain operates smoothly, reducing maintenance needs. Usage Instructions: For optimal performance, soak the filter in clean water for 2 minutes and rinse thoroughly under running water before installation. This process helps activate the carbon components, ensuring maximum filtration from the first use. Regular Replacement Recommendation: To maintain optimal water quality, replace the filter every 12 days. For households with multiple pets, consider more frequent changes to accommodate increased usage and maintain fountain efficiency. Quantity:A:12 Set Colour:As Shown Material:PP Package Contents: 12 * Cat Water Fountain Filters 12 * Sponges Foam Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.