on YOUTUBE theres a video on FUNGUS GNATS. thats what you have. theres a couple things you can do. FIRST off placing a cup of coffee in the grow room will atract the adults and drown them, this also helps in having something to identify, ALSO there is a procedure involving removing the top layer of soil, bout a inch, and placing some sand, bout a inch, to completely cover the top of the soil. this interrupts the life cycle and effectivly eliminates further gnats production. hope this helps....... BTW go to YOUTUBE and type in FUNGUS GNATS. there are quite a few videos.