Chris from Herald writes
Nibor D Insecticide mixed with a concentrate like Gentrol IGR Concentrate would be a better option for your needs than the Gentrol Aerosol can. Since your problem is coming from the septic system, you will need to use products that can reach the septic system completely. If you mix together the Nibor D and Gentrol IGR, you can pour it down toilets and drains to have it get carried into your septic system to coat the materials they are breeding and feeding on within the tank. It may take some time to eliminate all of them, but this would be the most efficient way to get chemical to them that would also be safe for your septic system. If you still have some persisting after a few weeks, you can mix up more to pour down the toilets and drains to treat again.
Answer last updated on: 06/21/2021
