Penthouse Paws Smart Water Fountain Filter Replacement Set. This complete replacement kit is specifically designed to work with the Penthouse Paws 2.2L / 74oz Smart Water Fountain, supporting consistent water quality with minimal effort. Each filter features a 5-layer filtration structure that helps reduce debris, hair, and unwanted odors commonly found in pet water bowls. The included foam pre-filters assist with trapping larger particles, while the carbon layers help improve overall water clarity and freshness. This set includes 6 carbon filters, 6 foam sponges, and 1 cleaning brush, providing everything needed for routine maintenance over several months. Filters are easy to replace and require no tools, making fountain upkeep quick and stress-free. For optimal results, it is recommended to replace the filter every 2 weeks, depending on usage and water conditions. Regular replacement helps maintain proper water flow and consistent fountain performance. A convenient Subscribe & Save option is available, delivering replacement filters every 3 months so you never run out. Designed for compatibility, ease of use, and everyday reliability, this filter set is an essential accessory for your Penthouse Paws Smart Water Fountain.