Fangrui Product Details Fangrui Product Details Compatibility : Specifically Designed For Stainless Steel Pet Water Fountain, This 12-pack Of Filters And 6 Pump Sponges Ensures And Function. Advanced Triple Filtration: Keep Your Pets Water Pristine With A Three-layer Filtration System. The First Layer Traps Hair And Debris, Activated Carbon In The Second Layer Removes Odors And Chlorine, And The Third Layer Uses Ion-exchange Resin To Heavy Metals And Enhance Water Taste. Pump Protection Mechanism: Extend The Lifespan Of Your Pet Fountains Pump With Our High-density Sponge Filters Designed To Prevent Hair And Debris From Causing Damage. Regular Of These Filters Ensures Continuous Protection And Optimal Fountain Performance. Regular For Optimal Freshness: To Maintain The Highest Water Quality For Your Pets, Especially In Multi-pet Households, We Recommend Replacing The Filters And Sponges Every Two Weeks. This Frequent Change Prevents Kidney Diseases And Keeps The Water Fresh And Appealing. Usage Instruction