Code: DPF005Replacement Filter Cartridges to keep water clean & fresh. Filters Three Ways Duo density Polyester Pad captures debris Carbon Impregnated Pad for quick action Granulated Carbon for extended action How often should I change the filter? Filters should be changed approximately every six to eight weeks for cats and four to six weeks for large dogs. Replace filters more frequently when using the fountain for multiple dogs and dogs that produce a lot of saliva. Does the Drinkwell Big Dog Fountain use the same filter as the Original Drinkwell Pet Fountain for Cats and Small Dogs? Yes, both fountains use the same filter. How do I get rid of the charcoal dust in the bowl? Rinse the filter in cold water. Even after rinsing, you will still have remnants of charcoal dust settling in the bottom of the bowl. This dust will eventually dissipate after a few cycles. The charcoal is completely harmless. Even as the dust settles in the bowl, it continues to work by absorbing bad tastes and odors and purifying the water. If you are uncomfortable with the amount of charcoal from the filter, you can remove it. The fountain will function without it. Fitting instructions included.
