need to stir up a bit of your soil n if you see alot of em crawlin round in it (youll have to look close) then you needa get em outta tat soil asap. the larva will eat your roots n eventually kill your babes. if the soils clear tho, like breeder say get some sticky traps n a fly swatter n jus take care of em as you see them. i had a pretty ba gnat problem, n got some ortho ecosense 3-in-1 rose and flower care shit tat protects against bugs n funguses n havent had a problem since, but your gonna have to carefully rinse the stuff off as it dries wit a white film, not sure if it clogs up anythin but look like you let a money shot go on your lil darlins... and tats pedophilia