Aquatic Midge Flies Controlled With Vertex Aeration

July 24th, 2013

Aerators Case StudyBy Vertex Water Features, Lake and Pond Aeration

Vertex 290% reduction in 16 months without pesticidesHibbs Grove, a residential housing development located in Cooper City, Florida was experiencing an ongoing outbreak of swarming midge flies from their 6.5 acre lake preventing residents from enjoying their lake front property. Sampling indicated an extreme infestation of midge larvae averaging more than six times the recognized nuisance level.

In order to combat their swarming midge fly problem, the residents of  Hibbs Grove turned to Vertex Water Features for an environmentally safe solution. Vertex Water Features surveyed the lake and proposed a CoActive Air 5 aeration systemwhich was installed. The system is designed to raise the lake’s bottom dissolved oxygen levels and create an overall healthier body of water. The Vertex aeration system provided diffused air through five Vertex XL2 CoActive AirStations™ placed at the deepest points throughout the lake, effectively circulating the entire water column 0.76 times per day.

The Results Highlights:After installation of the aeration system, oxygen levels increased and the accumulated organic muck on the bottom began to decompose thereby eliminating the habitat and food source that the midge larvae depended on, ultimately decreasing the number of larvae that emerged as adult flies.  The changing environment at the bottom allowed predators of the midge fly, such as fish and other aquatic insects to inhabit the area and compete with the midges for space and resources. Both the increased predation and competition contributed to the decrease in midge fly numbers.

Vertex 3Within 16 months of the Vertex CoActive Air 5 system installation, the midge fly larvae population had been reduced by 90 percent, from 6,794 larvae to just 660 larvae per square meter. Throughout the 16 months, there had been a visible increase in dragonflies and water beetles both of which are natural predators of the midge fly larvae.

With continued aeration, the oxygen levels have remained elevated and continue to oxidize bottom muck and suppress the midge fly population. Vertex Water Features, based out of Pompano, FL, is a customer-focused lake aeration and floating fountain manufacturer and trusted partner of SOLitude Lake Management.Download Free Report


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Since 1998, SOLitude Lake Management has been committed to providing full service lake and pond management services that improve water quality, preserve natural resources, and reduce our environmental footprint. Services are available throughout the Eastern United States. Fisheries management consulting and aquatic products are available nationwide. Learn more about SOLitude Lake Management and purchase products at

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