Quiet, economical filtration performance of the classic Whisper20 Power Filter is great for freshwater or saltwater aquariums. Energy-efficient designs feature low-wattage motors and adjustable flow control. Bio-Foam cultivates and maintains a bacterial bed for biological filtration, while easy to replace Bio-bag cartridges take care of chemical and mechanical filtration. Bio-Bags included. Measures: 7 in. x 3.5 in. x 7 in. The Whisper 20 is rated for aquariums up to 20 gallons, and has a maximum flow rate of 105 gph.
For more information about the Tetra Whisper 20 Power Filter, see the Manufacturer's Instruction manual.
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Best filter on the market 3/11/2013
I have 5 aquariums of varying sizes, and have kept fish for a very long time. Over the years I have tried a variety of different filters, and this is the best, by far. I use this size in a 10 gallon tank, and it keeps the water crystal-clear, and is quiet, efficient, and durable. I will never try another brand - this is the best!
Excellent flow and quiet too. 7/26/2012
I already own a junior one for my 5-1/2 gallon quarantine tank and have no issues. I bought this one for my newly set up 10 gallon tank and have no issues with it. It is very quiet in operation.