The Hagen AquaClear Power Filter provides mechanical, chemical and biological filtration through their multi-stage filtration system. Filtration volume is up to 7 times larger than comparable Filters. Its unique design filters aquarium water through a natural and silent waterfall. The patented flow control feature allows for customized filter performance. The Hagen AquaClear filter preserves beneficial bacterial creating a stress free environment for aquarium inhabitants and maintains clear aquarium water. Installation and maintenance are quick, easy and convenience. The filter comes equipped with AquaClear Foam, Activated Carbon and BioMax.