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Independent Aeration Test Results

Swan engaged GSEE Inc. an internationally recognized engineering firm, to conduct performance tests on our aeration tube in both fresh and salt water environments.  In a controlled study, GSEE Inc. compared an airlift aerator utilizing Aero-Tube™ technology with an equal horsepower paddle wheel and brush paddle wheel aerator, two of the most popular aeration technologies on the market today.

Aero-Tube™ performed extremely well in all areas, including its ability to transfer oxygen to water, expressed in terms of a standard oxygen rate (SOTR), and its efficiency in terms of pounds of oxygen per kilowatt-hour (the standard aerator efficiency or SAE Wire, rate).

Click graph to enlarge

In the fresh water testing, the Aero-Tube™ aerator exceeded the paddle wheel’s energy efficiency (SAE Wire) by up to 2.6 times.

Swan’s Aero-Tubeaeration tubing performed even better in the salt water test. As the density of the water’s salt content increased (from 5,000mg to 35,000 mg), the oxygen advantage of the Aero-Tube™ system steadily rose.  At 35,000 mg/L NaCl, the energy efficiency of Swan’s Aero-Tube™ aerator was as much as 4.2 times the efficiency of the paddle wheel.

Click graph to enlarge

Why did our aeration tubing outperform the paddle wheel? Because nearly all of the energy used to deliver the air that goes through our tubing goes directly into the water. A paddle wheel, wastes energy by throwing water into the air to pick up oxygen. Stated another way, “we put air in the water, not water in the air”.

The Aero-Tube™ effect can be seen clearly in the following graphs of the changing Dissolved Oxygen (DO) levels over time at different salinity levels.  The tank using Aero-Tube™ technology shows a quick and efficient gain in DO when compared to the paddle wheel tank.

Colorite Aeration Tubing

Colorite Aeration Tubing

Colorite Aeration Tubing


The bottom line in these studies is your bottom line.  Since Swan’s Aero-Tube™ aeration tubing efficiently transfers oxygen when compared to alternative aeration technologies you stand to save significant money in energy consumption over the lifetime of the system!

To Review the Raw Data from the GSEE Inc. CLICK HERE

How can Swan Aeration Tube deliver so much more oxygen than other products?

Take a look at the bubble diagram. It shows the size relationship of air bubbles produced by our aeration tube and those produced by a traditional aeration product. 

Glossary of Terms

1) Standard Oxygen Transfer Rate (SOTR) – Pounds of oxygen transferred to water per hour (lbs O2 /hour).  SOTR is measured in clean water when the dissolved oxygen (DO) concentration is zero at all points in the water volume, the water temperature is 20o C, and the barometric pressure is 1.00 atm (101kPa)

2) Standard Aeration Efficiency (SAE) – Standard Oxygen Transfer Rate per unit total power input.  SAE is typically expressed as the pounds of oxygen transferred to the water per hour per HP (lbs O2 /hour/HPwire), and is sometimes referred to as SAE Wire.  SAE is used as a measure of how efficiently an aerator is transferring oxygen.