The Quietflow 20 LED Pro Power Filter combines ultra-quiet operation, industry-high flow rate and enhanced filtration to provide the ideal solution for your aquarium. The 5 stage filtration process includes mechanical, chemical (carbon), biological, stationary wet/dry, and specialty media (ammonia/phosphate). The Quietflow also features an LED indicator to let you know when it’s time to change the cartridge! With a flow rate of 125 gph there’s more turnover and greater efficiency than similar filters. Easy to replace filter cartridges make this powerful tank filter easy to maintain. Includes a large sized cartridge to get you started.