---
product_id: 2202343
title: "Whisper Air Pump 20 To 40 Gallons, For Aquariums, Powerful Airflow, Non-UL Listed"
brand: "tetra"
price: "22440 Ft"
currency: HUF
in_stock: true
reviews_count: 8
url: https://www.desertcart.hu/products/2202343-whisper-air-pump-20-to-40-gallons-for-aquariums-powerful
store_origin: HU
region: Hungary
---

# 3.3 L/min airflow Fits 20-40 gallon tanks Patented quiet tech Whisper Air Pump 20 To 40 Gallons, For Aquariums, Powerful Airflow, Non-UL Listed

**Brand:** tetra
**Price:** 22440 Ft
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your aquarium’s vibe with whisper-quiet, powerful airflow!

## Quick Answers

- **What is this?** Whisper Air Pump 20 To 40 Gallons, For Aquariums, Powerful Airflow, Non-UL Listed by tetra
- **How much does it cost?** 22440 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/2202343-whisper-air-pump-20-to-40-gallons-for-aquariums-powerful)

## Best For

- tetra enthusiasts

## Why This Product

- Trusted tetra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Whisper-Quiet Operation:** Patented dome shape & sound chambers keep your space peaceful
- • **Vibration-Free Stability:** Rubber feet and suspended motor eliminate annoying vibrations
- • **Easy Setup & Durable Design:** Standard tubing compatibility with a trusted brand since 1951
- • **Powerful & Reliable Airflow:** 3.3 liters per minute ensures optimal oxygenation for happy aquatic life
- • **Perfect Fit for Mid-Size Tanks:** Designed specifically for 20-40 gallon aquariums, no guesswork needed

## Overview

The Tetra Whisper Easy to Use Air Pump delivers a steady 3.3 L/min airflow tailored for 20-40 gallon aquariums. Its patented dome shape, sound-dampening chambers, and vibration-isolating design ensure whisper-quiet operation, making it a favorite among fishkeepers seeking reliable, efficient aeration without noise disruption. Trusted since 1951, this durable, easy-to-install pump supports healthy aquatic environments with consistent oxygen and water movement.

## 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.

Review: Great air pumps - 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.
Review: MUCH better than Eheim - happy with my purchase so far - 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.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0009YF4FI |
| Air Flow Capacity | 3.3 Liters Per Minute |
| Best Sellers Rank | #7,860 in Pet Supplies ( See Top 100 in Pet Supplies ) #11 in Aquarium Air Pumps |
| Brand | Tetra |
| Brand Name | Tetra |
| Color | Blue |
| Customer Reviews | 4.5 4.5 out of 5 stars (44,942) |
| Date First Available | October 19, 2006 |
| Global Trade Identification Number | 00046798778530 |
| Included Components | Tetra Whisper Easy to Use Air Pump for Aquariums (Non-UL) |
| Item Dimensions LxWxH | 4.12 x 2.75 x 6.25 inches |
| Item Package Dimensions L x W x H | 6.32 x 4.21 x 2.91 inches |
| Item Weight | 13.76 ounces |
| Manufacturer | Tetra |
| Material | Plastic |
| Model Name | Tetra Whisper Air Pump 20 To 40 Gallons, For Aquariums, Powerful Airflow, Non-UL Listed |
| Number of Items | 1 |
| Operation Mode | Automatic |
| Package Weight | 0.42 Kilograms |
| Part Number | 77853 |
| Power Source | Corded Electric |
| Product Dimensions | 3.9"L x 2.8"W x 5.5"H |
| Size | 20-40-gallon |
| Style | 20-40-gallon |
| Suggested Users | unisex-adult |
| Team Name | Tetra |
| UPC | 046798778530 |
| Warranty Description | As Labeled |

## Product Details

- **Brand:** Tetra
- **Color:** Blue
- **Item Weight:** 13.76 ounces
- **Material:** Plastic
- **Product Dimensions:** 3.9"L x 2.8"W x 5.5"H

## Images

![Whisper Air Pump 20 To 40 Gallons, For Aquariums, Powerful Airflow, Non-UL Listed - Image 1](https://m.media-amazon.com/images/I/91jVrseno7L.jpg)

## Questions & Answers

**Q: Does this pump come with tubing? Or will I need to purchase extra?**
A: Contrary to some other answers, this pump doesn't come with anything else in the box except an instruction sheet.  You'll need tubing and valves and air stones and anything else you want to use with it.

**Q: Can I use this for making compost tea?**
A: I had the same question 3 years ago, after 3 months recovery from a torn Achilles surgery.  I got all interested in compost tea.  Commercial compost tea units seemed to be way more expensive than it should be.  I checked it out, and found some novel ideas on line which I took them and made my own.  I bought the whisper 100 air pump.  I put it into the bottom of a 50 gallon plastic trash can.  The important part - in order to get aeration I put micro drip irrigation plastic tubing.  The type of tubing I used has a raised area, about every foot with a tiny "drip" opening.  I just looked at the set-up, and it looks like I have 4 coils of tubing, separated from each other with some sort of bracket I improvised.Plenty of bubbles.  The reason that I am revisiting this post - we are setting up a fish pond and am checking out this whisper pump to adapt to its new purpose.

**Q: How many outlet does it have?**
A: The 10, 20, and 40 all have a single outlet, while the 60 and 100 have two outlets.

**Q: What diameter tube does this require?**
A: Standard 3/16" I.D. tubing. That size is quite common.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great air pumps
*by B***N on September 28, 2022*

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.

### ⭐⭐⭐⭐⭐ MUCH better than Eheim - happy with my purchase so far
*by J***S on May 15, 2020*

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.

### ⭐⭐⭐⭐⭐ Best aerator on the market 👌
*by H***N on October 11, 2025*

⭐⭐⭐⭐⭐ 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

## Frequently Bought Together

- Tetra Whisper Easy to Use Air Pump for Aquariums (Non-UL)
- Penn-Plax Standard Airline Tubing for Aquariums – Clear and Flexible – Resists Kinking – Safe for Freshwater and Saltwater Fish Tanks – 25 Feet
- AQUANEAT 3 Pack Aquarium Bio Sponge Filter Breeding Fry Betta Shrimp Nano Fish Tank (Small up to 10Gal)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-16*