Multi-layer Filtration System: Upgraded filters feature a high-density cotton mesh to capture hair, food residue, and other debris, while premium activated carbon particles help remove chlorine, odors, and impurities. Ion exchange resin reduces heavy metals, improving taste so your cats and dogs always drink cleaner, fresher water. Enhanced Pet Hydration Support: Consistent use of these replacement filters helps encourage pets to drink more by providing better-tasting water. Cleaner, better-filtered water can support your pet's overall health, from kidney function to urinary tract wellness, making this an ideal choice for multi-cat households and sensitive pets. Note Before Use: Before first use, soak each filter in clean water for about 5 minutes to activate the filtration materials, then rinse thoroughly under running water. This helps remove loose carbon dust and ensures optimal water flow, delivering clean, fresh water from the first use for your furry companions. Recommended Replacement Schedule: For best performance, replace the filter every 30 days to maintain strong filtration and water quality. We also suggest cleaning the water fountain and changing the water once a week in summer and every 2-3 weeks in cooler seasons to protect the pump and extend the service life of both pump and filters. Color: As Shown Material: Cotton Package Contents: 1*Inductive Filter Cartridge Cotton set 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.