Petco Premium Ceramic Cat Fountain Replacement FiltersThe easily replaceable heavy duty carbon filter allows your cat to enjoy consistently fresh water. The 3 layer filtration system captures debris and helps keep water fresh and clean. The filter removes bad tastes and odors and helps extend the lif of your fountain. Filters should be changed every 2-4 weeks depending on the size and number of pets using the fountain.
Rinse filter before use to help remove any loose bits of charcoal. Remove the pump housing cover. Insert filter into pump housing grooves. Slide filter down until flush with bottom. Replace the pump housing cover.