- Midge Flies


Midge flies, or chronomids, commonly occur in wastewater treatment plants and pond systems. The red worm that forms the midge loves the nutrient-rich conditions in a wastewate.treatment plant and feeds off bacteria and sludge.  Some customers tell us how the red worms eat up their mixed liquor.

Wastewater Impact
Red worms, also called blood worms, are found in mixed liquor. Over a period of ten days the eggs hatch into red worms and then pass through the pupa stage to become adult midge flies.

Aquabac Xt is a highly effective, US EPA-registered biological larvacide. It contains a species of bacteria called bacillus thuringiensis, approved pesticide for controlling red worms and midge flies in wastewater treatment plants.  It can either be dripped into the head of your plant or before the clarifier, depending on where you have the problem. This is a highly effective technology and is a nice alternative to Strike.

This plant in Oconomowoc, WI had an issue with blood worms and the resulting midge flies in their Hydrotech Discfilters.   They add our Aquabac XT once every two years and it keeps them away.   Super effective.

There is no LC50 for aquatic organisms except for mosquito larvae.  All other organisms except nuisance flies and midges Psychoda, Chironomus, and Chironomine are not affected by the product.  Minnows, fish, Daphnia, even other aquatic insects can’t be killed by the toxin in the formulation.  AquaBac XT is specific to mosquito, blackfly and midge larvae and again is not toxic to anything in the application sites except the larvae of these targets.  The LC50 against susceptible mosquito larvae averages 0.15 micrograms per milliliter

  • Kills Red Worms and resulting Midge Flies
  • Stops Red Worms from eating MLSS
  • Bacterial Based

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