The Fluval Hang On Back Filter is the perfect addition to any fish tank, providing a unique multi-stage filtration system that ensures superior water quality. With a filtration volume up to 7 times larger than other filters, this Power Filter is sure to keep your aquatic friends happy and healthy. The superior contact time with filter media, carbon, and sponge ensures that all unwanted particles and impurities are effectively removed from the water. Perfect for both freshwater and saltwater tanks, the Fluval Hang On Back Filter is a reliable and efficient choice for any aquatic environment. Keep your fish happy and their water pristine with this top-of-the-line Power Filter from Fluval.