
Midge Fly Complete
KILL MIDGES DEAD. AQUABACxt is an EPA registered biolarvicide for controlling red worms and midge flies in wastewater treatment systems. Lar-V-Zyme breaks down red worm cocoons and the organic matter surrounding them, exposing more of the larvae to AQUABACxt for increased efficacy.
$610.00
Wastewater Plant Dosing
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Flow Rate (Gallons per day) |
Initial Dose (Twice a week for 4 weeks)
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Maintenance Dose (Once per week)
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100,000 GPD |
0.5 gal AQUABACxt + 0.5 gal Larva-Zyme
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1 pt AQUABACxt + 1 pt Larva-Zyme
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500,000 GPD |
2.5 gal AQUABACxt + 2.5 gal Larva-Zyme
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5 pt AQUABACxt + 5 pt Larva-Zyme
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1,000,000 GPD
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5 gal AQUABACxt + 5 gal Larva-Zyme
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10 pt AQUABACxt + 10 pt Larva-Zyme
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Wastewater Lagoon Dosing | ||
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Lagoon Size | Initial Dose (Once a week for 4 weeks) | Maintenance Dose (Once a week for 2 months) |
1 Acres | 2.5 gal AQUABACxt + 2.5 gal Larva-Zyme | 1 gal AQUABACxt + 1 gal Larva-Zyme |
4 Acres | 10 gal AQUABACxt + 10 gal Larva-Zyme | 4 gal AQUABACxt + 4 gal Larva-Zyme |
8 Acres | 20 gal AQUABACxt + 20 gal Larva-Zyme | 8 gal AQUABACxt + 8 gal Larva-Zyme |
Product Details
Midge Fly Complete is a powerful biological solution developed to eliminate midge flies, redworms, blood worms, and other midges that cause operational challenges in wastewater treatment facilities. This two-part system combines AQUABACxt, a US EPA-registered Bti larvicide containing Bacillus thuringiensis israelensis (Bti), with Lar-V-Zyme, an enzyme-based formula that breaks down red worm cocoons and organic debris. Together, they deliver superior results by exposing hidden larvae and stopping infestations at their source.
Applying Midge Fly Complete is easy and highly effective. AQUABACxt uses Bti endotoxins to selectively target the stomach lining of midge fly and red worm larvae, causing them to starve and die without harming humans, aquatic life, or beneficial microorganisms. At the same time, Lar-V-Zyme dissolves protective cocoons made from fats, oils, greases (FOG), fibers, and papers, ensuring that more larvae are vulnerable to treatment. This dual-action method is ideal for controlling persistent red worm infestations in activated sludge systems, clarifiers, and return lines.
Wastewater operators trust Midge Fly Complete for reliable wastewater treatment fly control, helping to prevent common problems such as disappearing MLSS, clumpy or stringy sludge, and the attraction of nuisance flies. Regular applications—especially during early spring and late fall—support plant stability, minimize maintenance needs, and reduce reliance on harsh chemical treatments. This biological approach promotes a cleaner, more efficient wastewater environment.
Quick Highlights:
- What it is: A dual-product system featuring AQUABACxt (Bti-based biolarvicide) and Lar-V-Zyme (cocoon-degrading enzyme).
- How it is used: Applied directly where larvae activity is observed; follow specific dosing based on plant flow rate.
- Why it is helpful: Breaks the lifecycle of harmful insects biologically, offers effective red worm infestation control, and supports ongoing wastewater treatment fly control.
Case Studies
Case Study – UV Disinfection Room

Challenge
A 6.5 MGD wastewater treatment plant in Wisconsin was dealing with a UV disinfection room that was always covered in midge flies. The operators were constantly cleaning the room and had installed bug zappers to try and control them. Unfortunately killing the flies did no good as new ones were constantly developing in the clarifiers.
Solution
They began using our AQUABACxt to rid their system of red worms at the source without harming the good bacteria and Lar-V-Zyme to degrade the protective cocoons.
Results
This combination was very effective and now they have a UV building that’s not a nightmare to spend time in.