I don't really doubt that NASA has used GH, but the fact that they have means nothing. The guys at NASA understand better than most that GH is just minerals and H20 in a bottle. Don't get it twisted i'm not knocking GH; just saying NASA has the ability to source nutreints from anywhere or make...
Dude if you want a non-toxic solution to your pest i've found a product that has worked ever time for me. I think it's called Tanlin, but i know it works by cutting the pests in your medium with thediatomeaceous earth and then has a bacteria added to it that completely eradicates those MFers...
The Best Powdery Mildew Treatment I've ever had the pleasure to use is this stuff Called "PMT" or "Miltrol" by CX Hydroponics. It is distributed by Biofloral-USA in the states and Biofloral in Canada. You can get more info @ www.canadianxpress.com. Just ask your local Hydro store to stock it, or...