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CrystalClear PondAir 4, Complete Aeration Kit, Whisper Quiet Water Garden Oxygenation Bubbler System Adds Oxygen to Koi & Fish Ponds, Outdoor Aerator Compressor Pump, Tubing & 4 Air Submersible Stone

4.5 4.5 out of 5 stars 621 ratings

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PondAir 4 Aeration Kit

Purchase options and add-ons

Brand Airmax
Color Blue
Style Diaphragm
Power Source Battery Powered
Item Weight 16 ounces
Voltage 115 Volts

About this item

  • Small Aerator for Ponds up to 2,000 Gallons -- Increases water circulation and oxygen saturation, improving the natural ecosystem. Ideal for a backyard pond, water garden, or small outdoor fishpond.
  • Improves Water Quality & Clarity -- Bottom-diffused aerators push air through an air stone and into your pond. Aeration supports beneficial bacteria that work to clear pond water and eliminate muck.
  • Quiet Operation & Energy Efficient -- Electric compressor equipment has near-silent operation and is designed to run 24/7, using only 8 watts of power. Aerate your koi pond for just pennies a month!
  • Various Uses -- Use during the winter months to help keep a hole in pond ice and to vent harmful gases. Aerator kits can also be used in a large aquarium, stock tank, or hydroponic application.
  • Optional Faux Rock Cover - Protect your investment from the elements by adding a TrueRock Mini cover. The fake rock is vented for proper airflow to the equipment. Constructed of durable fiberglass.
See more product details

Customer ratings by feature

Easy to assemble
4.8 4.8
Easy to install
4.6 4.6
Noise level
4.5 4.5
Value for money
4.0 4.0

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CrystalClear PondAir 4, Aeration Kit for Water Gardens & Koi Fish Ponds up to 2,000 Gallons, Quiet & Energy Efficient, Made for Year-Round Use to Maintain Clean & Clear Water
Airmax CrystalClear PondAir 4, Aeration Kit for Water Gardens & Koi Fish Ponds up to 2,000 Gallons, Quiet & Energy Efficient, Made for Year-Round Use to Maintain Clean & Clear Water
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Price$94.99$69.99$46.99$199.99$49.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to assemble
4.8
4.6
5.0
4.6
Easy to install
4.6
4.2
4.9
4.2
Noise level
4.5
4.3
4.6
4.3
Value for money
4.0
2.9
4.1
2.9
Longevity
3.3
3.4
3.6
3.4
Sold By
Airmax, Inc.
Tenyon
Rexii
Airmax, Inc.
Tenyon
power source
Battery Powered
Corded Electric
Corded Electric
Corded Electric
Corded Electric
material
Plastic, Copper, Steel, Rubber
Plastic, Copper, Steel, Rubber
Plastic, Copper, Steel, Rubber
style
Diaphragm
Up to 2000 Gallon
Modern
Garden,Outdoor
Up to 1000 Gallon
maximum flow rate
3.2 gallons per minute
0.21 cubic feet per minute
1.6 gallons per minute
weight
1 pounds
2.15 kilograms
10.95 pounds
1.15 kilograms

From the brand


Product Description

Template

Breathe Life Into Your Pond

If you experience murky water, debris accumulation, or are struggling to maintain a healthy fish population, your pond may be suffering from a lack of oxygen and proper circulation.

CrystalClear, PondAir, Aeration

Air Stone Diffusers - Designed to improve oxygen absorption, these 2-inch diameter air stones create ultra-fine air bubbles that infuse oxygen directly into the water column.

Koi Fish in pond
Benefits of Increased Oxygen

Increased oxygen promotes a healthier and more balanced aquatic environment and supports all aquatic organisms, such as fish and plants. In addition, increasing oxygen improves water quality by reducing the buildup of harmful gases and organic matter, which can lead to stagnation and foul odors.

Oxygenation also enhances the nutrient cycle, aiding in the decomposition of organic material and the growth of beneficial bacteria.

Aerates Ponds up to 2,000 Gallons, 2 Feet Deep

Improves Water Quality & Clarity

PondAir 2 & 4 Aeration Kit delivers essential oxygen and circulation to ponds up to 2,000 gallons and up to 2 feet deep. Designed as a complete aeration solution, the PondAir aeration kits contain everything you need to introduce aeration to a small water garden or water feature with a quick and simple installation.

Choose between two aeration kit options based on your pond size, and start aerating the water in your pond today.

  • Design For 24−7 Use
  • Easy to Install & Maintain
  • Quiet Operation & Energy Efficient

CrystalClear, PondAir, Aeration, Compressor

Crystal Clear waterCrystalClear, PondAir, Aeration, Compressor, dial with Koi

Crystal Clear water with Koi

CrystalClear, PondAir, Aeration, Compressor

High Efficiency, Quiet Aeration Pump

These whisper-quiet diaphragm aeration pumps are the heart and soul of our the PondAir 2 & 4 Aeration Kits. Costing just pennies a month to run, you can feel good about providing constant aeration to your pond.

Airflow Control Dial

Dial-in aeration output with the twist of your finger. The airflow control dial enables you to restrict airflow to your pond when desired without the need for tools or stone adjustments. Simply turn the dial to restrict airflow or run the aeration pump at full output for maximum aeration.

Black Vinyl Airline

Flexible black vinyl airline allows for strategic air stone placement to maximize air and water circulation. PondAir vinyl airline has an approximate inside diameter of 1/8-inch and is packaged in 30-foot rolls.

Directional Check Valves

Water tends to climb aeration airlines when your aeration pump is powered down. Airflow check valves allow oxygen to travel outwards from the aeration pump while preventing water from traveling into the lines when not in use to prevent potential water damage to your aeration unit.

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CrystalClear PondAir 2 CrystalClear PondAir 4 CrystalClear KoiAir Mini CrystalClear KoiAir 1 CrystalClear KoiAir 2
Customer Reviews
4.5 out of 5 stars
2,086
4.5 out of 5 stars
621
4.5 out of 5 stars
464
4.5 out of 5 stars
464
Max Pond Size 1,000 Gallons 2,000 Gallons 4,000 Gallons 8,000 Gallons 16,000 Gallons
Max Diffuser Depth 2 Feet 2 Feet 4 Feet 4 Feet 4 Feet
Number of Diffusers/Airstones 2 (Blue Air Stones) 4 (Blue Air Stones) 1 (Single Stick Plate) 1 (Dual Stick Plate) 2 (Dual Stick Plate)
Amount of Included Airline (x2) 30 Feet Rolls (x4) 30 Feet Rolls 15 Feet Roll 25 Feet Roll 50 Feet Roll
Compatible Air Line 1/8 Inch Inner Diameter 1/8 Inch Inner Diameter 3/8 Inch Inner Diameter 3/8 Inch Inner Diameter 3/8 Inch Inner Diameter
Power Cord Length 6 Feet 6 Feet 6 Feet 6 Feet 6 Feet
Compressor Wattage 4 8 17 17 35
Voltage 115v 115v 115v 115v 115v
Amperage 0.03 0.07 0.15 0.15 0.30
24/7 Hour Operating Cost (calculated at $0.10 per kilowatt hour, costs vary by location) $0.29 $0.58 $1.22 $1.22 $2.52
Fish in clear pond

Benefits of Aeration

Aeration promotes oxygen which is the lifeline of every ecosystem. Although waterfalls and fountain sprays add oxygen to the water, they are not always enough and should be supplemented with diffused aeration. With bottom-diffused aeration, water is more efficiently circulated, which increases dissolved oxygen levels. Bottom-diffused aeration:

  1. Reduces Maintenance – In conjunction with proper filtration, adding aeration will keep your pond cleaner longer. This means you can spend more time relaxing around your pond rather than spending time cleaning it.
  2. Saves Money – Aeration systems are energy-efficient and can help you cut down on your energy bill. These systems are designed to run 24/7, yet only cost a few bucks per month. Rather than running a costly waterfall pump all the time, use a pump only when you are there to enjoy it and rely on a properly sized aeration system to keep the dissolved oxygen levels high. This small change can save you hundreds of dollars each year.
  3. Supports Beneficial Bacteria: Beneficial bacteria are aerobic and need oxygen to survive. These bacteria consume the excess nutrients in your pond, which fuel algae growth and pond muck accumulation. Aeration allows these bacteria to work harder to clean up your pond, leading to an overall cleaner pond.

In addition, fish love aeration! Your fish will gather around and enjoy the bubbles coming from the diffusers.

Water Garden, Pond, Aeration

FAQs

How do I choose the right size aeration kit?

When it comes to aeration kits, finding the right fit is key. Properly sized aeration units will infuse oxygen into the pond, circulate water, and help create a balanced ecosystem. Your fish will be happier and healthier, and you will have reduced excess organic material in your pond – meaning fewer nutrients to fuel algae growth. When selecting an aeration kit, you need to account for pond shape, depth, and shape.

How often do you need to replace the air stones?

You only need to replace airstones if there is damage. If you are experiencing poor performance and low amounts of air coming out of the blue air stone, start by cleaning off any debris or algae that may have accumulated. If cleaning does not improve performance, then most likely the unit needs a compressor maintenance kit.

How often should I install a new maintenance kit?

We recommend installing a new maintenance kit every year. Over time the compressor diaphragm can become worn, and this wear will greatly reduce the air output of the unit. Installation is easy and there are step-by-step videos of the process.

Will a pond aerator keep an open hole in the ice during winter?

Aeration kits infuse oxygen into the water by releasing small bubbles from an air stone, which moves the water and allows for gas exchange. In most climates, aeration is sufficient to maintain open water in even freezing conditions. If you live in a colder climate, however, your water garden may need a little extra help during the winter. In this case, a combination de-icer and aeration kit is a great solution. Using them together will ensure that a hole is kept open in the ice, water circulates properly, and dissolved oxygen levels remain high. Additionally, using a pond aeration kit during winter will allow you to use a smaller wattage de-icer, which could help you save money on your energy bill.

Are there other steps needed for winter pond care?

During the winter, we recommend moving the air stones to half your maximum depth. This will help reduce ice formation and keep a pocket of warm water for your fish at the bottom of the pond.

Koi Fish in clean pond

Maintain a Thriving Pond Ecosystem

Keep your pond healthy with energy-efficient aeration year round.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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CrystalClear

CrystalClear PondAir 4, Aeration Kit for Water Gardens & Koi Fish Ponds up to 2,000 Gallons, Quiet & Energy Efficient, Made for Year-Round Use to Maintain Clean & Clear Water


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Important information

Bulb Voltage

115 volts

Customer reviews

4.5 out of 5 stars
4.5 out of 5
621 global ratings

Customers say

Customers like the performance, ease of installation, and noise of the water pump. For example, they mention it works well, is easy to assemble, and quiet. Some appreciate the versatility, and health. That said, opinions are mixed on quality, air flow, and value.

AI-generated from the text of customer reviews

91 customers mention74 positive17 negative

Customers like the performance of the water pump. They mention that it works well, moves a lot of water, and is quiet. Some say that the cover and bubbler work well, and the check valves work well. Overall, most are satisfied with the performance and functionality of the product.

"...I’d recommend this unit. Works well. I didn’t rate the longevity because I’ve only had it working for a week or so now...." Read more

"...artificial rock cove at the same time as a package deal and the cover works great, even though it's hidden behind tall grass...." Read more

"Works great but one of the output lines doe not function" Read more

"...The air stones are a good size and work pretty good but are cheaply made and after about a 6 month to a year they all broke..." Read more

28 customers mention28 positive0 negative

Customers find the installation of the water pump to be easy. They mention that it comes nicely packaged with easy instructions. Some customers also mention that the aerator is quiet and easy to assemble. Overall, customers are satisfied with the ease of installation of this water pump.

"Item came nicely packaged with easy instructions. This was easy to install in my outdoor fish pond...." Read more

"Easy to install, great bubblers, our fish love em!" Read more

"It is so quiet and easy to install" Read more

"...It was easy to set up. Only drawback is that the airlines float; adding stainless steel fender washers to keep them on the bottom." Read more

25 customers mention22 positive3 negative

Customers like the noise level of the water pump. For example, they say it's fairly quiet, has no sound coming from it, and it adjusts the air volume for different times of the year.

"...Some reviews complained about noise, but I find it to be fairly quiet. You have to expect some noise level but I don’t pay any attention to it." Read more

"...I placed the unit on a flat stone with the cover. There is no sound coming from the unit." Read more

"It is so quiet and easy to install" Read more

"...The pump is very quiet (I keep ours hidden under a fake rock), and the check valves work well...." Read more

16 customers mention16 positive0 negative

Customers find the water pump versatile and useful for their ponds. They mention it's quiet, efficient, and easily installed. Some say the pump is great for a small pond and ideal for the oblong pond shape. The air stones are a good size and work pretty good. Overall, customers are happy with the product's versatility and quality.

"...I highly recommend the pump.The air stones are a good size and work pretty good but are cheaply made and after about a 6 month to a..." Read more

"...a fantastic job of aerating the pond for the fish, and keeping ice and snow from forming in the cold months...." Read more

"...The hoses are very long and easy to install...." Read more

"...These are great in my 1400 gallon pond. The protective rock feature is a game changer!" Read more

12 customers mention12 positive0 negative

Customers are satisfied with the health of their fish. They mention that the water pump keeps their fish healthy, active, and happy. Some say that the product last fall and had no problem with the fish. Overall, most are happy with the product's ability to improve the health and appearance of their pond.

"...the system in the pond for just for just one day, it was amazing of how the fish responded...." Read more

"...Easy to install and produces a strong stream of bubbles. My pound is happy and healthy." Read more

"...Only used about a month but my fish are doing well and my pond is looking great!!! This was exactly what I needed for the Texas heat in my pond." Read more

"This item works great in my pond (900 gallons) and the fish seem much more active since I have added this...." Read more

42 customers mention15 positive27 negative

Customers are mixed about the quality of the water pump. Some mention it's well made, reliable, and quiet. However, others say that the diaphragm broke within less than a year and the airstones were broken in the box.

"...One of my check valves was not working by not allowing air to pass through it and through the air stone, so I messaged the seller...." Read more

"...It does seem very durable and well built. I will update in a few more months." Read more

"...The air stones are a good size and work pretty good but are cheaply made and after about a 6 month to a year they all broke..." Read more

"...One of the check valves didn't work, but the company sent replacement right away. It was easy to set up...." Read more

28 customers mention17 positive11 negative

Customers are mixed about the air flow of the water pump. Some mention that it puts out more air than the previous brand they had, and provides excellent aeration for their pond. However, others say that it barely pushes air into the water and the valves did not work properly.

"...and is relatively quiet and has an air control know that helps with regulating air flow." Read more

"...One of my check valves was not working by not allowing air to pass through it and through the air stone, so I messaged the seller...." Read more

"I like the fact that it runs quiet easy to assemble and puts out lots of oxygen" Read more

"...You can easily increase or decrease the air flow to each air ball and it has been working round the clock to provide oxygen for my fish during our..." Read more

23 customers mention11 positive12 negative

Customers are mixed about the value of the water pump. Some mention that it's a reasonable method to provide aeration to small garden fish ponds, and a reliable product for the money. However, other customers say that it was a waste of money, a piece of junk, and effectively unusable.

"...So, one star off for this being a bad value. (One more because it is annoyingly noisy.)..." Read more

"...Great value for the money I'd say." Read more

"...Although the bellies are replaceable, they are very pricey. You can’t just buy the rubber bellows, your going to pay for the entire diaphragm...." Read more

"...We would purchase this again, good price and so far no issues other than the dmaged parts when it arrived...." Read more

Works amazing with no air pump sound.
5 Stars
Works amazing with no air pump sound.
The temperatures in Utah have been in the upper 90's and the Koi fish didn't seem to have a lot of energy. I decided to give this brand a try after reading reviews on other brands. After having the system in the pond for just for just one day, it was amazing of how the fish responded. It is now day three and the fish are active in the heat of the day and loving life. My pond has always been clear, but it's strarting to look cleaner. Seriouly, the best purchase I've ever made! I also purchased the artificial rock cove at the same time as a package deal and the cover works great, even though it's hidden behind tall grass. I placed the unit on a flat stone with the cover. There is no sound coming from the unit.
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Top reviews from the United States

Reviewed in the United States on September 22, 2022
Size: PondAir 4 Aeration KitVerified Purchase
3 people found this helpful
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Reviewed in the United States on July 31, 2023
Size: PondAir 2 with TrueRock Greystone CoverVerified Purchase
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5.0 out of 5 stars Works amazing with no air pump sound.
Reviewed in the United States on July 31, 2023
The temperatures in Utah have been in the upper 90's and the Koi fish didn't seem to have a lot of energy. I decided to give this brand a try after reading reviews on other brands. After having the system in the pond for just for just one day, it was amazing of how the fish responded. It is now day three and the fish are active in the heat of the day and loving life. My pond has always been clear, but it's strarting to look cleaner. Seriouly, the best purchase I've ever made! I also purchased the artificial rock cove at the same time as a package deal and the cover works great, even though it's hidden behind tall grass. I placed the unit on a flat stone with the cover. There is no sound coming from the unit.
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Reviewed in the United States on August 31, 2023
Size: PondAir 4 Aeration KitVerified Purchase
Reviewed in the United States on December 31, 2023
Size: PondAir 4 Aeration KitVerified Purchase
Reviewed in the United States on February 13, 2024
Size: PondAir 4 Aeration KitVerified Purchase
Reviewed in the United States on September 9, 2023
Size: PondAir 4 Aeration KitVerified Purchase
Reviewed in the United States on April 27, 2015
2 people found this helpful
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Reviewed in the United States on July 13, 2022
Size: PondAir 4 Aeration KitVerified Purchase
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