Just started using Neem 3 days ago on budding plants as I just got infested recently. They already claimed 1 pretty much.
Next time around I am going to do the preventative thing.
Try and look up www.naturescontrol.com/triplethreat I had heard of these a couple of days ago while at a disp. Also ran a thread here asking if anyone had heard of these but apparently no one has. They're to be used once you already have an infestation prob though so not for preventative I guess.
Anyway, good luck to you.

MM
MarijuanaMike11 Reviewed by MarijuanaMike11 on . Spider Mites/Gnats PREVENTION in Hydro? I'm growing hydro and after getting spider mites I am damn good at keeping them under control and/or killing them. However, I wanted to get more tips on how to PREVENT them from even existing. I know the hygiene factors, everything must be clean, the atmosphere must not be too hot or too humid etc. But what can I truly use in the reservoir to avoid having any spider mites, gnats, etc to even appear. :/ Thanks for all the help!!! Rating: 5