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Tetra

Tetra Whisper Air Pump 20 To 40 Gallons, For Aquariums, Powerful Airflow, Non-UL Listed

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Availability: In Stock.
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Arrives Tuesday, Aug 4
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Size: 20-40-gallon


Features

  • POWERFUL: Tetra Whisper Air Pump provides dependable airflow to your aquarium.
  • QUIET: Patented dome shape, suspended motor and sound-dampening chambers for quiet operation.
  • PROVIDES OXYGEN AND WATER MOVEMENT: Keeps underwater pets happy.
  • AVAILABLE SIZES: Select the proper size for your tank 10, 20 and 40-gallon pumps have single air outlets, 60 and 100-gallon pumps feature dual outlets.
  • NON-UL LISTED: Reliable performance at an economical cost.

Description

Tetra Whisper Air Pumps for aquariums provide powerful, dependable airflow. Efficient and easy-to-use, Whisper Air Pumps are available in a range of sizes to handle the aeration needs of aquariums from 10 to 100 gallons. Tetra Whisper 40 Air Pump (non-UL) can be used in tanks 20 to 40 gallons. The Tetra Whisper Air Pump’s patented dome shape and sound-dampening chambers minimize turbulence and produce a smooth, quiet stream of air. Its wide footprint, rubber feet and suspended pump motor eliminate sound-producing vibrations. Thick walls insulate motor noise, and powerful diaphragms provide ample airflow for deep water applications. Uses standard-size aquarium tubing. Select the proper size air pump for your tank. Since 1951, Tetra has developed the world’s most comprehensive body of fish food knowledge, and fishkeeping enthusiasts have looked to the brand for products and solutions that add ease and beauty to their home. Whether you're an experienced hobbyist or just starting out, Tetra has everything you need – from a large variety of quality fish food and innovative equipment to test kits and decor. Manufacturer Contact Information Jacob Palet

Color: Blue


Brand: Tetra


Material: Plastic


Item Weight: 0.86 Pounds


Product Dimensions: 3.9"L x 2.8"W x 5.5"H


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 4.12 x 2.75 x 6.25 inches; 13.76 ounces


Manufacturer recommended age ‏ : ‎ 1 month and up


Item model number ‏ : ‎ 77853


Department ‏ : ‎ unisex-adult


Date First Available ‏ : ‎ October 19, 2006


Manufacturer ‏ : ‎ Tetra


Best Sellers Rank: #6,337 in Pet Supplies (See Top 100 in Pet Supplies) #10 in Aquarium Air Pumps


#10 in Aquarium Air Pumps:


Power Source: Corded Electric


Air Flow Capacity: 3.3 Liters Per Minute


Operation Mode: Automatic


Battery Capacity: 40 Gallons


Item Weight: 0.86 Pounds


Item Dimensions L x W x H: 3.9"L x 2.8"W x 5.5"H


Color: Blue


Material Type: Plastic


Brand Name: Tetra


Team Name: Tetra


Global Trade Identification Number: 30


Manufacturer: Tetra


Unit Count: 1.0 Count


UPC: 046798778530


Included Components: Tetra Whisper Easy to Use Air Pump for Aquariums (Non-UL)


Item Type Name: Tetra Whisper Easy to Use Air Pump for Aquariums (Non-UL)


Manufacturer Contact Information: Jacob Palet


Model Number: 77853


Manufacturer Part Number: 77853


Warranty Description: As Labeled


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Aug 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Great air pumps
Size: 20-40-gallon
Tetra Whisper Easy to Use Air Pump for Aquariums (Non-UL) ~ 20 - 40 gallon ~ AKA Whisper 40 Upgrading from my long running Whisper 10 to a 40 as I'm adding a sponge filter to the mix. And my 10 which is still going strong will be kicked down to a 5.5 gallon tank for quarantine or fry. New one seems just like the old one just a little more powerful which is exactly what I hoped. I find these style Tetra pumps to be kind of a gold standard because in my experience they're quite reliable and long lasting, maybe not the quietest on the planet but not loud at all, and very well powered for the price, which is very reasonable. And they've been around for quite a while and sold in a lot of places so they've got consistency down. You can get a quieter pump but will pay a whole lot more for an actually long lasting one with the same power, and I find these Tetras to be reasonably quiet. Unless you're really critical or sensitive to a low hum I don't even notice from across the room. And you can find cheaper pumps, or ones in the same price range with a 2nd output or adjustable flow, but they are usually under-powered or disposable junk. These Tetras are just all around good solid basic air pumps. And I can just split or regulate my lines. I do wish they would stick to listing these as "Whisper 40" or whatever like it says on the pumps or a standard model number like "AP-40" instead of this gallon range nonsense. The original numbers were always implied gallon ratings anyway but this range thing being the main naming distinction just muddies the waters of what we're all used to. I'd say 20 - 40 gallon is a fair ballpark range for a Whisper 40 but there's enough variables that could easily throw that off that it doesn't make sense for the main naming distinction. If all you want is a single little air stone a Whisper 10 would likely be all you need up to 30 or possibly more gallons. Definitely for a 20 long which isn't that deep. And if you had a 10 gallon tank with a sponge filter or bubble wall plus some other bubble feature you would definitely benefit from going up to a Whisper 40. Implying gallons it in the model number is fine, at least we know the models, getting rid of model numbers so the pump doesn't even have a name any more, just a range of questionable accuracy is stupid in my opinion. Plus it's just a nuisance taking something that's been around long enough that tons of people know the standard numbers, not to mention it's mentioned that way all over the internet anyone new to the hobby will find, and now have to decipher what this range nonsense is. I come knowing I wanted a 40 and see 20-40, 40-60, etc, and I'm like what? I know now the max number is the one that corresponds to the old standard number but it's just stupid. The one I got says Whisper 40 on the bottom of the pump as I would expect but that's not in this listing anywhere. Why? And you could still list the suggested gallon range in the description or on the box somewhere, just put a standard non-changing number on the box and anywhere there's product selection online so we can know the model without playing games. ... show more
Reviewed in the United States on September 28, 2022 by Bob Dawson
    • MUCH better than Eheim - happy with my purchase so far
Size: 60-100-gallon
Rating: 4.5 stars Would I recommend? Yes! My current tank setup is a 40-gallon breeder with one axolotl. We had still been using a cheap, unbranded air pump designed for our old 10-gallon starter tank for the past year and a half or so; it still worked and produced sufficient air to power two bubble accessories, but was loud as sin. Especially when the tank chiller was going at the same time, the noise level was really annoying. Since we're home all the time now during quarantine, it got really irritating listening to that air pump, so I did a lot of research that led me to the Eheim brand of pumps. They supposedly had the best power and noise level. I ordered the Eheim 200 (which is supposedly overpowered for my 40-gallon tank, as it's rated for 60 gallons) and returned it the same day I received it. Even with BOTH of its outputs combined with a T-connector and cranked up to maximum output, it was not strong enough to produce ANY visible bubbles, even when connected to only one bubble accessory. It was pathetic: yes it's quiet, but that's because it doesn't do anything! I don't think we just got a dud, either, as we could feel the air output on our hands, it was just very weak. We were very disappointed. It was not at ALL worth the price, and functioned worse than our cheapo beginner air pump. Next up, I finally decided to try the Tetra whisper. We read from a reviewer who tested the output and dB of many pumps that this one was NOT the quietest, but was efficient, inexpensive, and quiet enough for the price. I was also still wary of many negative reviews. After my previous disappointment, I really considered getting a Tetra pump intended for deep water application (overkill, but we wanted to make sure this one actually worked!) but finally decided to compromise on a Tetra Whisper 100-gallon pump. Unlike the Eheim, it doesn't offer built-in output controls, but it does have 2 outputs. I really only need one output, and the power is still overkill, but thankfully... this one WORKS! The device is easy to set up, and functions well even when both outputs are connected via a T-connector (I also use a one-way valve at that point just to prevent backflow). We have the pump itself plugged in inside a cabinet under the tank, and we run a line up into the aquarium via a hole in the lid. I then split off the line with an air manifold inside the tank itself and have it hooked up to two bubble toy accessories. I am delighted to report this is capable of powering both, without producing an excess air volume. Our axie likes to hang out near the bubblers. Best of all, this pump really is quiet. It does produce an audible low hum when you're nearby, but does not rattle and cause other things in our cabinet to vibrate loudly like our old pump did. The volume is negligible when not standing next to the cabinet with the doors open. It is actually a huge relief. I would recommend this product over the Eheim pumps especially, and would advise others to go for a significantly higher volume rating than their tank volume if they intend to power anything more than a bubble wand. I also recommend purchasing a T-connector with one-way valve if you need to power a single accessory that needs more air power, such as a filter. ... show more
Reviewed in the United States on May 15, 2020 by Amazon Customer
    • Tetra whisper air pump
Size: 60-100-gallon
Works great excellent airflow even in my 50 gallon tank also very quiet. I would highly recommend this product.
Reviewed in the United States on July 7, 2026 by Anne Andreas
    • Quiet, dependable air pump perfect for small aquariums
Size: up to 10-gallons
The Tetra Whisper Air Pump is a reliable and affordable option for small aquarium setups up to 10 gallons. The name says it all — it's impressively quiet compared to other air pumps I've used. Running it continuously in my bedroom aquarium doesn't disturb sleep or daily activities at all. The airflow is powerful enough to drive a sponge filter or air stone effectively in a smaller tank. Setup is simple — just attach an airline tube and you're good to go. The unit is compact and lightweight, making it easy to position discreetly near the tank. It's been running for months without any issues and hasn't shown any signs of losing output power. The rubber feet keep it from vibrating on the shelf. For anyone with a small freshwater tank who needs a quiet, dependable air pump at a budget price, the Tetra Whisper is a solid choice that has earned its reputation in the fishkeeping hobby. ... show more
Reviewed in the United States on April 15, 2026 by andrew
    • Works great
Size: up to 10-gallons
Was recommended this air pump to replace one i had that was being very loud. The quality is good, has enough power to make quite a bit of bubbles for my sponge filter.
Reviewed in the United States on April 1, 2026 by Amazon Customer
    • Best aerator on the market 👌
Size: 60-100-gallon
Review Image by HEIDI & WAYNE JACKSON
⭐⭐⭐⭐⭐ Solid, Quiet, and Reliable Air Pump I’ve used a lot of different air pumps over the years, and this Tetra Whisper really lives up to its name. It runs quietly with barely any vibration, and the air output is strong and consistent. The pressure is more than enough to power multiple air stones or sponge filters without losing performance. The housing feels sturdy, setup was super simple, and the pump maintains good airflow even after running nonstop for years im just purchasing this one as my fifth one lol . The Bubble output is outstanding and the noise level stays low enough that you barely notice it’s on. Overall, it’s a dependable little workhorse that performs better than most pumps in this price range. Definitely worth it if you want something efficient and quiet. I've got one one my 300 gallon and it's plenty of air ... show more
Reviewed in the United States on October 11, 2025 by HEIDI & WAYNE JACKSON
    • Quite
Size: 20-40-gallon
Great quality, very quiet. My fishes love it 😊
Reviewed in the United States on June 13, 2026 by Sherry C
    • Still LOUD.
Size: up to 10-gallons
Quieter than most but not the quietest I've gotten. I recommend the NICREW Nano Silent Aquarium Air Pump.
Reviewed in the United States on July 15, 2026 by Tyler Anderson

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