KittySpout Cat Water Fountain Filters for 108oz/3.2L (4 Month Supply: 8 Filters & 8 Sponges)

Filtration Efficiency: Each filter works to maintain water clarity by removing impurities, while the pre-filter sponges are effective at capturing hair, dust, and food particles before they reach the main filter. | Quality Materials: Constructed from non-toxic materials. | Usage Instructions: Prior to installation, it's important to soak and rinse the filters thoroughly with clean water. For optimal performance, clean the filter with every water change in your pet's fountain and replace the filter and sponge every 2 weeks.