Aeration System Design

Our onsite aeration assessment services allow our biologists to measure the dissolved oxygen levels throughout the waterbody to accurately assess your aeration needs. Additionally, our biologists will use these numbers to determine what diffusers to use, placement of the diffusers and your aeration system to strategically improve water quality.

Aquatic Biologists, Inc. strongly believes in customizing each diffused aeration system we install to meet the unique characteristics of the individual waterbody.

Bottom diffused aeration systems are comprised of four components:

  1. Diffusers
  2. Air Hose
  3. Compressor(s)
  4. Compressor Cabinet with Cooling Fan

In addition to sales, we also install and service all types of systems in Wisconsin and northern Illinois.

Water Circulators are available where directional flow or winter de-icing is needed.

ABI utilizes the most efficient diffusers on the market!

ABI AquaBio Diffuser Series

Maximize Aeration Performance with ABI AquaBio Diffusers. Engineered to outperform all other diffusers, including other membrane diffusers

ABI AquaBio diffusers are designed specifically to maximize aeration efficiency. Diffuser selection is based on "certified" performance standards directly correlated to CFM delivery rates and water depth.

What Makes the AquaBio Series Diffusers Up To 27% More Efficient Than Other Diffusers?

More Surface Area Moves More Water

Less Flow Interference (Areas Blocking Water Movement)

Flow Through Design Moves More Water

Less Back Pressure = Increase CFM Output

Thick Wall Membrane Creates Fine Micro-Bubbles

Less Cleaning


Made in Wisconsin!

How ABI Predator Diffusers Work

AquaBio Diffusers Compared to Rubber Disks

AquaBio Diffusers Compared to Traditional Air Stones

Up to 50% More Air Flow (When Using Same CFM)

Up to 75% More Air Flow (When Using Same CFM)

Turnover Rate is Almost Double

Turnover Rate is Almost Double

20% Better Oxygen Transfer per CFM

No Cracking or Chipping

8" Disk: Linear Lift 28.3"

6" Air Stone: Linear Lift 15"

8" Diisk: Active Surface Area 60.10 in. sq.

6" Air Stone: Acrive Surface Area 27 in. sq.

12" Disk: Linear Lift 38.38"

9" Air Stone: Linear Lift 21"

12" Disk: Active Surface Area 113.4 in sq.

9" Air Stone: Active Surface Area 39.38 in. sq.

AquaBio Diffusers:

  • Maximize Oxygen Transfer and Energy Efficiency
  • Reduce Odors and/or Harmful Gases
  • Lower Pathogenic Bacteria Count
  • Increase Microbial Populations to Further Increase Organic Sediment Reduction
  • Increase Fish Carrying Capacity
  • Create an Unfavorable Growing Environment for Blue-Green Algae
  • Restore Water Quality
  • Bubble Size: 50 - 500 microns

Six Shot

Ten shot
AquaBio Six Shot
AquaBio Ten Shot

Operating Range 0.25-4 cfm

Operating Range: 0.5-6 cfm


(Optimum 2 cfm)

(Optimum 2.75 cfm)








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Aqua Bio

Each Aqua Bio diffuser utilizes a specially manufactured Porex tubing to create the formation of fine micro bubbles (50 - 500 microns) in a 360 degree radius around the entire length of tubing. Stainless steel plate allows for extended life and protection of the diffuser tubing while maintaining the diffuser above the soft sediment.

Three year limited warranty.     Order Online


AquaAir™ provides ponds and lakes with superior aeration, circulation, and de-stratification. Dissolved oxygen (DO) levels are increased throughout the entire water column with the use of bottom-mounted diffusers. The micro-bubbles entrain bottom water and synergistically lift it to the surface where atmospheric oxygen is absorbed and then transferred throughout the water column.

AquaAir™ aeration systems offer the following lake and pond benefits:

  • Entire water column circulation - up to 4000 gpm depending on diffuser depth
  • Elimination of thermal stratification
  • Increased dissolved oxygen levels that stimulate the natural aerobic digestion process thus reducing nutrient levels and associated algal growth
  • Elimination of oxygen related fish kills and expansion of the oxygenated habitat and ecosystem
  • Reduction of mosquito and aquatic midge infestations
  • Elimination of foul odors from undesirable dissolved gases
  • Reduction of organic bottom sediment
  • 5 Year Warranty on all in-water components
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Robust-Aire diffusers create more water flow to aerate your pond. Diffusers are designed to provide a fine air bubble with the least amount of pressure. The base is made of thick HDPE plastic and a locking fill plug allows you to fill it with pea gravel or other weighted substrate.

It has a raised design that keeps the diffusers performing at an optimal level above the pond bottom. A durable, bolted, strain relief attachment ensures that the weighted tubing will not become detached during installation or maintenance. A check valve with Viton seals keeps water from entering the tubing when the system is not operating.

For best results Kasco Marine recommends using as part a complete Robust-Aire Aereation System


ABI utilizes rotary vane compressors in most applications.  These compressors are extremely reliable and can easily last 20 years with simple routine maintenance. Due to the efficiency of our AquaBio diffusers, we can use a ¼ hp vane compressor in applications where a ½ or even ¾ hp was needed 5 years ago.  This dramatically cuts down on power consumption and noise levels from the unit.

In deeper water situations, rocking piston compressors can also be used, where higher pressure is needed.

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Directional flow aeration equipment draws oxygen from above the water's surface through an air-intake tube powered by a submerged electric motor. The oxygen enters the propeller chamber, where it is mixed rapidly by a specially designed propeller. The propeller breaks down the aspirated oxygen into fine bubbles while mixing them with water entering through the protected intake chamber. These bubbles are then thrust via the propeller into the water, providing horizontal circulation of oxygen.

Aquatic Biologists, Inc. utilizes both Kasco Marine Circulators & AquaMaster UltiMax Air injectors.

Kasco Circulators/De-Icers

Water movers are great for shallow ponds where diffused aeration is inefficient. Moving water insures that otherwise stagnant areas receive oxygenated surface waters. The moving water is also a deterrent to unwanted algae growth.

Stagnant water contributes to rapid mosquito reproduction, including those that may carry the West Nile Virus. Creating a stream environment helps limit mosquito reproduction and thereby helps control the overall population of mosquitoes in your area.

Kascos can also be used to reduce organic sediment by moving oxygenated water toward the bottom of the pond. This replenishes the bottom oxygen content, and encouraging the growth of microbial organisms. Kascos can also be used to keep open water during the winter. They are great for around boat docks.

An optional dock mount is available to attach directly to a boat dock or a treated 4x4 spike driven into the pond bottom.  We also offer a custom stainless steel spike for areas with sediment accumulation. They can also be suspended from a float.

Kasco Circulator Features and Benefits

  • Efficient / Low Power Use: Highest efficiency design for low power consumption versus competing units. Reduces operating costs over the entire life of the unit.
  • Rugged Motor: Environmentally friendly design with a hard-face internal mechanical seal for protection against leaks. Long-life top and bottom ball bearings. Flood oil lubricated for excellent heat dissipation.
  • Corrosion Resistant: Superior dependability in salt-water or other corrosive environments. All external metal motor, float, and hardware components are of stainless steel composition and protected by a sacrificial zinc anode.
  • Low Maintenance: Clean the motor housing once or twice per year and replacing the sacrificial zinc anode when visibly corroded.
  • Fully Tested: ETL listed to stringent UL and CSA Safety Standards
  • Ships Easily: Via UPS
  • Dependable: Backed by a 2 year warranty on 1/2-1HP

All models include a float and two (or three) 50′ braided nylon mooring ropes and are available with 50′, 100′, 150′, or 200′ (250′, 300′, 400′, or 500′ for 240V models) SJTOW underwater rated electrical power cords.

AquaMaster Ultimax

This series of aerators provides horizontal circulation of water and oxygen at or below the surface. Powered by an exclusive submerged electric motor, the specifically designed propeller circulates water directionally. Available in mixer, aspirator, surface float, or bottom fixed base versions.


ULTIMAX Features and Advantages:

  • UL, cUL Listed & CE Recognized
  • Low profile motor mounted below waterline
  • Submerged oil-cooled motor for long life
  • Shrouded propeller for greater circulation
  • Adjustable attack angle for greatest efficiency
  • Up to 130 cubic ft./min. air injection
  • Up to 60 lbs. of thrust for maximum circulation
  • 1/2 to 5 HP; single and three phase motors
  • Stainless steel motor housings
  • 3 Year Warranty, 1HP & up
  • 3 Year no internal maintenance guarantee 1HP & up
  • 2 Year Warranty, 1/2 HP
  • ULTIMAX Aeration Systems are also available Fixed Base Mounted.

Wind Powered Aerator

Although not nearly as efficient as diffused air systems, windmill aerators are a great option for remote ponds. The windmill can be located hundreds of feet from the pond, allowing placement in the windiest location. Double diaphragm windmills are also available, which increase windmill efficiency by 240 percent. Consult with an ABI representative before utilizing a windmill to determine if this application fills the aeration needs.

Solar Powered Aerators

Solar Powered units are available - Consult with an ABI representative for more information.

Ice Domes

Winter aeration will maintain open water. This may pose a problem to people or animals falling through the ice. Ice domes solve this problem by allowing the diffused air to escape up through the dome vent. This allows ice to form around the dome. Ice domes may also discourage geese from staying around too long in the fall.