Aqueon QuietFlow Replacement Filter Cartridges are dual-sided replaceable dense-floss cartridges that provide an even distribution of carbon. These filter cartridges contain over 25 percent more activated carbon than other leading brands.
For use with Aqueon QuietFlow 20, 30, 50, 55 & 75 Power Filters. Replacement is quick and simple for minimal filter downtime. Cartridges should be replaced when water begins to enter the filter bypass and/or the cartridge becomes clogged. Cartridges should be changed every 4-6 weeks for optimal filtration.