Jorge from Miami Fl writes
If you have cockroaches actually coming from the septic tank then the biggest concern you will have is finding the area in the tank, lid, or septic lines that has a crack in it that is allowing the roaches access. They would not go down your drains from inside your home to then start a colony or population within the septic tank or system. Since they would have gained access from the yard/lines, the problem may persist if the source is not found and closed up or fixed. Nibor D can be used down the toilet and drains, and you will likely want to put a little down all of them within the home so you get even dispersal of the product. Nisus advises to use about 5 scoops of the Nibor D in a gallon of water, and do about ½ gallon of solution per toilet to flush down, and about 1/3 gallon of solution per drain. You may need to reapply it after a few weeks, depending on the severity of the infestation.
Answer last updated on: 09/16/2019
