So i've been gone from my place for a week and i left my plants with my friend. I come back and my plants have powder all over them. I found out its powder mildew...great, and from what i've read i was going to use neem oil to fix it. My ? is, how do i use it? How much do i put in? how many gallons/liters? Heres some pics so you know what im dealing with. My jedi death star has it the worst, than my pac10. I have them in a screen box to try and keep the spores from spreading any worse till i get the oil. PLEEASE anyone whos used neem oil before let me know whats up? Thankyou!