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After many years of research, we believe aeration to be the foundation for improving and maintaining proper water quality in ponds and lakes. Lake bed aeration acts to increase dissolved oxygen levels while eliminating water stratification.


Industry leading solutions
for good water quality

Kasco Surface Aerators

Kasco Surface Aerators

Kasco Surface Aerators are the clear market leaders, with more installations than any other manufacturer. Independent testing at Auburn University found that Kasco’s aerators’ SAE (Standard Aeration Efficiency) is up to 3.0 lbs of oxygen per horsepower per hour of operation, making them some of the most efficient and effective units available.

Kasco Surface Aerators dramatically agitate high volumes of water at the surface, maximizing air and water exposure to create valuable gas exchange. Surface Aerators are your best choice for aeration when a decorative fountain pattern is neither necessary nor desired.

Kasco Surface aerators

High performance surface aerators dramatically push high volumes of water into the air. This process increases the overall health of your water and keeps it thoroughly mixed. These self-contained units deliver up to 3.0 lbs of O2 per horsepower per hour of operation, making Kasco surface aerators the most dependable and efficient units on the market.

Product Features

– Proven performance for continuous, supplemental or emergency use
– 1/2, 3/4 and 1HP sizes can easily by moved and installed by 1 person
– ETL listed as complete package to UL and CSA safety standards
– Power cords can be protected with a flex sleeve cord protector
– 2 year warranty on 1/2, 3/4 and 1HP
– 3 year warranty on 2, 3HP and 5HP

Package Includes
– Float and mounting hardware
– Optional bottom screen and hardware
– Optional lighting package
– Control panels are optional for all single phase units
– Control panels are included for three phase units except “U” models

Surface Aerator 50Hz Units

50Hz ModelsSize (HP)PhaseVoltageAmpsMinimum Depth (cm)


Various Sizes

Kasco-Surface Aerators-5HP

Kasco-Surface Aerator-3.1HP

Kasco-Surface Aerator-5.1HP

Kasco-Surface Aerator-2400 (2)

Kasco-Surface Aerator-3.3HP


Common Applications

– Commercial aquaculture
– Residential ponds and lakes
– Retention ponds
– Leachate ponds
– Industrial lagoons
– Marina entrance and navigation



Kasco Diffused Aeration

Kasco Diffused Aeration

NEW Kasco’s Robust-Aire™ systems are NOW 34% quieter and easier to maintain. Newly redesigned, these systems feature a significant reduction in sound (patent pending), larger air filters on 1/4HP and 1/2HP systems for less frequent cleaning, and a visual maintenance indicator to alert when maintenance is needed.

Robust-Aire™ systems pump compressed air from a shore-mounted compressor through self-weighted lines to a diffuser on the pond, lake or tank bottom. The diffuser then continuously releases micro-bubbles that rise to the surface carrying large volumes of water. This induces oxygen-transfer as well as beneficial water movement and mixing.

All Robust-Aire™ diffused aeration systems are available with an optional remote manifold allowing the compressor to be installed up to a mile away from the water’s edge

Product Features

– Great for depths 2.4 metres and deeper
– No electricity required in the water
– Speeds up organic decomposition
– Designed for continuous operation

– Diffuser: 5 years
– Compressor: 2 years
– Cabinet: 5 years
– Tubing: 10 years

Package Includes
– Diffuser assembly
– SureSink™ self-weighted tubing
– Mounting option
– Compressor(s)

Common Applications

– Backyard ponds & lakes
– Industrial
– Mixing
– Winterkill prevention
– Waterfowl protection


Part Number Cabinet Number of Diffusers Voltage Compressor
RAE1-NCNo Cabinet1220(1) 1/4HP
RAE2-NCNo Cabinet2220(1) 1/2HP
RAE3-NCNo Cabinet3220(1) 1/2HP
RAE4-NCNo Cabinet4220(2) 1/2HP
RAE5-NCNo Cabinet5220(2) 1/2HP
RAE6-NCNo Cabinet6220(2) 1/2HP
RAE1-PMPost Mount Cabinet1220(1) 1/4HP
RAE2-PMPost Mount Cabinet2220(1) 1/2HP
RAE3-PMPost Mount Cabinet3220(1) 1/2HP
RAE1Base Mount Cabinet1220(1) 1/4HP
RAE2Base Mount Cabinet2220(1) 1/2HP
RAE3Base Mount Cabinet3220(1) 1/2HP
RAE4Base Mount Cabinet4220(2) 1/2HP
RAE5Base Mount Cabinet5220(2) 1/2HP
RAE6Base Mount Cabinet6220(2) 1/2HP





Kasco-Robust Aire-Surface

Kasco-Robust Aire-Winter

Kasco-Robust Aire-Winter (1)











Kasco Circulators

Kasco Circulators

By creating a strong, directional flow of water, Kasco circulators help to solve many common aquatic issues. This continuous water movement helps to eliminate stagnant areas, remove debris and increase oxygen transfer. These units are designed and built to perform year-round in a variety of applications from lake front property to harsh saltwater environments, making them the most reliable, and versatile on the market.

Depending on pond bottom, at least 60 cm. of operating depth is recommended

Product Features

– ETL listed as complete package to UL and CSA safety standards
– Low maintenance for dependability and ease of use
– 2 year limited warranty

Package Includes
– Horizontal float (additional mounting options available)
– Mooring lines
– Optional control panel

Common Solutions

– Remove unwanted floating debris
– Potentially control mosquitoes
– Reduce odors by continuously moving water
– Break up thermal stratification
– Mix chemicals in tanks and other industrial settings
– Prevent fish ills and ice damage to docks and piers

Horizontal Float Packages

Part NumberHPVoltagePhaseThrust (lbs)





Kasco-Circulator-Horizontal Float-3400CF


Kasco-Industrial Mount

Kasco-Universal Mount-New

Kasco-Universal Mount-New-Grass

Universal Mount Packages

Part NumberHPVoltagePhaseThrust (lbs)



Bubble Tubing Aeration

Bubble Tubing Aeration

Fine bubble diffusers such as our Bubble Tubing® produce many tiny air bubbles (less than 1 mm in diameter). Tiny bubbles rise steadily from the floor of a wastewater treatment basin or the bottom of waterways and canals, ponds, lakes or lagoons. These bubbles provide substantial and efficient mass transfer of oxygen into the water. This oxygen, combined with the food source, sewage or sediment, allows naturally occurring bacteria to produce enzymes.  Enzymes help break down waste or sediment made of accumulated organic matter.

Fine Bubble Technology at work

The size of the bubble matters greatly for the application as we have noticed in our work. The fine bubbles (microbubbles) are critical for achieving precise results whether oxygenating a wastewater treatment plant, using aeration to biologically remove excess nutrients, or using aeration for fluid mixing.  Air bubble curtains applications that rely more on mixing and moving water also benefit from billions upon billions of microbubbles produced by Bubble Tubing®. Not only do bubbles transfer oxygen and decontaminate water by oxidation, but they also move and mix, clarify, and de-stratify water. Thus the same technology has many diverse applications.

Bubble Tubing® optimises oxygen transfer and lifts water which aids in total circulation throughout the water column.  As it functions without moving parts or electricity in the water, it increases performance efficiency while significantly reducing electrical and maintenance costs in comparison to other aeration systems.  This tubing, made of highly resistant yet flexible PVC, is non-kinking and holds no memory when deployed.

Features of Bubble Tubing®

  • Bubble Tubing® is flexible, it holds no memory and will not kink, is easy to install and is safe for the environment (does not contain lead).
  • Made exclusively in Canada to our exact specifications, impressive 5-year warranty.
  • High oxygen transfer rate. A full evaluation of the oxygen transfer capabilities by independent firm available.
  • Applications range from farm ponds to the largest industrial projects.
  • Suitable for fresh and saltwater applications, from shallow to deep waters.
  • Inner pressure prevents clogging; tubing is low maintenance, anti-fouling.
  • No moving parts or electricity in the water.
  • Highly resistant PVC (chemicals, salinity, temperature).
  • Weighted and non-weighted formats available.
  • Tubing can be purchased with all the necessary hardware, ready to be installed.

Operations: How does Bubble Tubing® work?

Compressed air enters the tubing creating an inner pressure. It is released through the perforations thanks to the precision holes found along both sides of the entire length of tubing.   The ensuing micro-bubbles are efficient in preventing clogging and fouling (typically found in porous diffusers), of the entire length of tubing.  They form a bubble curtain of uniform and evenly dispersed fine bubbles.

CanadianAir™ System Plan witn Bubble Tubing® fine bubble diffuser

No matter the scale of operations the same basic principle applies: A compressor’s heat hose is attached to the airline delivery hose which itself is connected to the Bubble Tubing® equipped with a check valve. The compressor pushes the air through both the feeder hose and the diffuser tubing that releases the air uniformly into the water.

We offer all the necessary products from start to finish, to fully set-up a reliable and efficient aeration system for you. We can size the compressor for the application, suggest tubing layout, suggest cost effective design modifications, and offer to troubleshoot. Our experience designing aeration and deicing systems with Bubble Tubing® is substantial, and our expertise is sought for many aeration projects.

Silt Barrier and turbidity curtains to contain sediments in suspension

Bubble curtains also meet the requirement for containing silt and turbidity for in-situ work where sediment containment barriers are mandatory. When operating in a stream, river or lake, marine construction and dredging companies are required to install a physical curtain called a floating turbidity barrier.lick on picture to enlarge

These obstacles do not allow free passage for boats and work equipment. Whereas a bubble curtain does both: it allows movement of boats and equipment over the barrier while retaining sediment and other suspended matter. In this case, a bubble curtain installed from the stream, river or lake bed will mitigate the migration of silt and other suspended sediments through the water column.

Our Bubble Tubing® has proven to be very useful as a silt barrier and turbidity curtain during these applications. Also, in this article, research is currently underway to validate the effectiveness of bubble curtains in altering stream dynamics. Water currents in the outer curves of riverbeds are slower allowing for sediment deposition and accumulation.  Over time, a sand bank can be created, making shipping impossible without dredging under certain circumstances. By installing a bubble curtain in this outer curve, this creates a sufficient current to prevent sediment buildup.

These are a few of the applications for Bubble Curtains. We look forward to working closely with engineers, scientists and water managers to find bubble curtain applications to protect wildlife and the environment so projects can move forward in an environmentally responsible manner.

Who may need to create a bubble barrier?

Bubble Tubing® comes in different sizes and format. Custom request also available

Demand for bubble curtains is booming. Who are our customers:

  • Port authorities
  • Shipbuilding companies
  • Acoustic reduction specialists
  • Environmental firms
  • Hotel chains
  • Oil platform managers
  • Companies specialising in dredging
  • Marine construction companies
  • Hydroelectric dam managers
  • Companies specialising in fish barriers
  • Naval bases
  • Environmental engineering firms
  • Cities to recover waste in canals and rivers
  • Floating waste recovery companies
  • Environmental groups and citizen associations



BioBoost Aeration

BioBoost Aeration

A Revolutionary Way To Clean Water

Increase Water’s Oxygen

The advanced aeration of BioBoost is far more efficient than conventional aeration systems, which have not improved in decades. By breaking up and separating bubbles, rise time and oxygen transfer are increased. Also, by dramatically increasing the area of the rising water column, BioBoost creates greater turbulence throughout the water eliminating stratification and promoting off-gassing.

Nurture Beneficial Bacteria

BioBoost media becomes a nest for beneficial bacteria, providing structure for it to proliferate. With an unlimited food source from the constantly circulating water and increased oxygen, the microbes can out-compete algae by starving it of its food source – the organic pollutants in the water. Algae cycling can be stopped while reducing the need for chemical application.

See how it works


Common Uses

  • Lakes and ponds
  • Aquaculture
  • Hatcheries
  • Water features
  • Retention ponds
  • Decorative Ponds
  • And more!


  • No chemicals
  • Increases water’s oxygen
  • Low-maintenance
  • Year-round solution
  • Removes nasty algae
Small61 cm long x 30.5 cm high x 30.5 cm wide
Medium91 cm long x 61 cm high x 46 cm wide
Large122 cm long x 61 cm high x 61 cm wide



1. What is the difference between surface and submersed aeration?

Within the industry, a surface aerator is a device that takes water from the vicinity of the surface and throws it into the air, where it picks up atmospheric oxygen. Submerged aeration typically uses air bubbles that are released below the surface and give up the oxygen they contain as they rise. Another method is the Synergistic Technique. It destratifies and puts oxygen on the bottom where it will improve the overall water quality of the lake. Surface aeration is excellent in an emergency. It can quickly put a lot of oxygen in a small area where the fish can come to survive. Never use submerged aeration systems in an emergency, as the oxygen put in is diluted throughout the water column and the higher oxygen levels normally found on the surface are made lower by upward pulsing bottom water.

2. Will aeration control algae and weed problems?

Algae obtain their nutrients from the water, while submerged weeds typically obtain nutrients from root systems in the soil of the lake bottom. Aeration would have no effect on the rooted plants, but it can have a profound effect on the algae, depending upon many circumstances. In the right situation, a well-designed aeration system will greatly reduce algae primarily by reducing nutrient cycling from the formerly anaerobic bottom. As the water clarity improves, the plant community may shift to submerged weeds.

3. How does aeration put oxygen into the water? At what rate?

Lake aeration devices, from surface aerators to synergistic airlifts, put oxygen into the water between the rates of 1-10 pounds of oxygen per horsepower per hour (.6 – 6.0 kilograms per kilowatt). Fountains are at the low end of the oxygen transfer rate, as they expend much more energy putting on a show than they do transferring oxygen. Synergistic airlifts are at the other end of the spectrum because they expend very little energy and circulate huge quantities of water upward. In this case, the interaction at the surface of the lake adds to the majority of the oxygen added to the water.

4. Will aeration improve water quality and clarity?

Only when aeration is done correctly will it improve water quality and water clarity. All lakes are different and they often need an engineered approach. When a stratified lake is destratified, water quality is improved by reducing the nutrient cycling and increasing the assimilation capacity. In some lakes with very clear surface water, destratification can reduce water clarity.

5. How long will it take for aeration to improve a lake?

In general, the time will vary between 2 and 12 months before visually significant improvements are reached. If the lake is a good candidate for aeration, and if the aeration system is designed correctly, it will definitely continue to improve the water clarity year after year, unless more nutrients re added.

6. Why is the synergistic diffuser manifold more efficient at deeper depths?

It is not efficient at shallow depths because of the short distance between the low pressure and high-pressure areas of the water column. Since high pressure will flow to low pressure, the close proximity of the boil at the surface to the low-pressure “suction” at the bottom causes a short circuit. In a deep lake, the distances between the high pressure and the low are too great for this effect to take place.

7. Does the aeration system have to run continuously?

Yes. We design all of our systems to be small in size and to operate continuously, as opposed to a large system that operates intermittently. However, they can be shut down completely or intermittently during cold months.

8. If I live on a large lake, can I just aerate my backyard portion?

In most cases, this would not have a beneficial effect on the lake in total. If a diffuser were placed above the thermocline, it would induce circulation and act as an artificial structure that would be a fish attracter. If the diffuser were below the thermocline, it would be lifting some of the coolest, heaviest, worst quality water and putting it on the surface in front of your property. For aeration to be effective in the overall water quality improvement of the lake, it has to be designed for the entire lake or a hypolimnetically isolated portion of the lake.