I already got gnats from my promix after just a few days
Honeypot trap for gnats works really well. Small pot of dirt, put molasses directly into the soil, then cover the top with the yellow sticky strips. When the stickys get too covered with gnats, just replace them. Eventually you'll get them all. Something in the soil to prevent eggs such as nematodes or gnatrol will make it quicker.
Ladybugs are great for thrips and aphids. They will take aphids down FAST. I'm pretty sure those sick fuckers cannabalize each other too, as I never find near as many ladybugs dead as I launched live...