Dude! Change your thread title to something appropriate to the question!!!!!!
Anyway though, I personally like using "goGnats" from Hydro-Organics. It's a non-poison insecticide that works well for mites, gnats, thrips, aphids, whiteflys, etc. that is safe to use even all the way through harvest. You can get it at many hydro shops, or at
www.atlantihydroponics.com, or at
www.hydro-organics.com. I've had very good luck with it so far.
Good luck!!!!!