Cat Water Fountain Filter with Triple Filtration System with Resin and Activated Carbon

Regular Replacement: For optimal filtration, it is recommended to replace the cat water fountain filter every three to four weeks (depending on usage frequency). To prevent activated carbon dust (which is harmless to your pet) from falling into the water, soak the filter in water for 5 minutes before use, then rinse it thoroughly under running water. Protect your pet's health: Filters help reduce the risk of urinary tract infections; this is very important for your pet's health.