What is aeration?
Aeration simply means adding oxygen to water. Oxygen is the backbone to any healthy aquatic ecosystem—keeping plants, animals and “good” microbes alive. These “good” microbes—aerobic bacteria who thrive in oxygenated environments—are the key to a healthy dam. They feed on the sludge on the floor of your dam and starve out algae and weeds by consuming their nutrients (e.g. nitrogen, phosphorus). They also eradicate smells by outcompeting “bad” microbes which emit odours.
How do aerators work?
Aerators add oxygen to dams and ponds by pumping air or water into the waterbody (either at the surface or the floor). This circulates the water, encouraging oxygenated top-waters to sink to the bottom and deoxygenated bottom-waters to rise to the surface. When the bottom-waters reach the surface, gas exchange occurs, whereby “bad” gases (e.g. methane, hydrogen sulphides) exit the water and “good” gases (e.g. oxygen) enter the water.