Whisper 40 Power Filter - Up to 40 gal.

6 Reviews
SKU: 247242
Manufacturer: Tetra
MPN: 25774

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Quiet, economical filtration performance of the classic Whisper 40 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: 8 in. x 4.5 in. x 7.5 in. The Whisper 40 is rated for aquariums up to 40 gallons, and has a maximum flow rate of 210 gph.

For more information about the Tetra Whisper 40 Power Filter, see the Manufacturer's Instruction manual.

For more info on Hang-on Power Filters, please see Power Aquarium Filter Basics.


Includes MediaLarge Bio Bag Cartridge
Flow Rate210 gph
Power Cord Length6 ft.
Warranty2 year Warranty
UL ListedYes
Max Tank Size40 gal.
Length8 in.
Height7.5 in.
Internal Id


Click here to download the instruction manual from Tetra's website.



i recently replaced all my pumps {5}on my fish tanks, BIG MISSTAKE......these are the noiseiest ones that i have ever had in my life.....wish that i had not done it............



<br>Absolutely quiet!!
<br>You must be doing something wrong.
<br>Make sure the impeller is seated properly in the motor, and keep the level of water in tank to top.

Raised Discus


I used Whisper power filters for many years and was able to adjust carbon and use ammo chips if I chose. Once I got the hang of it, I never had a problem. Recently started my aquarium up again and could not by Whisper locally. I have tried 3 different major brands and each was its own type of disaster.

Doesn't fit my 40 gal tank


I've been using Whisper filters for over 20 years. Just bought the newly designed Power Filter 40, but it will not fit on the back of my aquarium like the previous filter did. I use a full hood with 48" fluorescent tube light, and it will not fit over the lip in the back.

whisper filter


Worked great for me as additional filter on a large tank. Its not silent but very noisy. Easy Yuri clean and set up



I have owned every size of these Power Filters Whisper has and have loved each one. They are simple, efficient, quality, quiet and I've had clean clear Aquariums largely due to the help of these Filters. BUY THEM!