I add 3 heaping tsp’s to every gallon of water everytime I pour anything on my plants (regardless of if I’m watering Or fertilizing)- haven’t seen a single flying insect anywhere in my home since- that didn’t get in through an open door anyway lol. As a rural country home owner on a septic system- this product has been a lifesaver! Big fan- would definitely buy this in a larger size at some point if packaging options allow for it