The AquaClear 20 Power Filter provides mechanical, chemical and biological filtration through its 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 media basket prevents water by-pass around the filter media maximizing filtration efficiency. The filter preserves beneficial bacterial creating a stress free environment for aquarium inhabitants and maintains clear aquarium water. Installation and maintenance are quick, easy and convenient. The filter comes equipped with AquaClear Foam, Activated Carbon and BioMax. AquaClear offers an entire line of media including Zeo- Carb and Ammonia Remover exclusively designed for the AquaClear 20 Power Filter. The AquaClear 20 Power Filter is ideal for use in 5-20 US gallon (18-76L) aquariums
Not as good as other Aquaclear models by bto83 from near Chicago01/29/2014
Aquaclears are great for their customizability and this model is just as good on that score, but the squarish dimensions on the AC70 seem to amplify the sound of the impeller and lid vibrations more than any other models I own (AC50 and AC110). I can get the rest of my Aquaclears to run virtually silent outside of the waterfall return's noise, but I've had this about a month now and it still reverberates a faint grinding/rattling sound throughout the room.