I purchased this for both an indoor flea problem from our cat bringing them in and an infestation of water bugs that came in with new flooring we had installed. I was fortunate in that I found the nest of water bugs in an old toy chest in our garage that I was able to remove and take care of a big chunk of the problem. For the remainder of the problem, I swept the boric acid dust in the crack between the flooring and walls, behind the washer and dryer, and for the fleas in our laundry room along the baseboards. I also used it along the foundation of the entire house outside. In the laundry room, I used a hand broom to push it into the carpet along the walls (Berber). After a few days, we started seeing dead water bugs. I was still seeing some live ones as well, but in the last few days I have not seen any live ones. I have not had any ill effects from using it, and my pets all seem just fine. I am finally seeing the fleas die off in the laundry room, but I cannot comment much on the effectiveness of the boric acid, as I have taken a 3-pronged approach with this room, using diatomaceous earth as well as intense vacuuming every other day or so in addition to the boric acid dust. I give it 4 stars and not 5 simply because it takes a lot of work to use it, but I would rather use this than a toxic spray.
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