Exel LG and Aeroponics

Im having a problem with powdery mildew and I tried everything in the book and I just bought a jug of Exel LG from my local hydro store. I am running stinkbuds system and I am in the veg stage currently. My question is do I add the Exel to the resevoir? how much? I know I can use it as a foliar spray but I heard that getting "inside" the plant is best because thats where the core of the powdery mildew is.

How'd you end up applying the exel LG? Any hints, tricks, or tips?

How did you get on with it?

I have small spots of powdery mildew that I'm babysitting getting rid of with ph adjusted to 8.0 ro water. I justspray it on the affted areas 2-3 times per day. Looking into a sulphur burner as well to take care of it as well...

I had a big problem with PM and fought it for a year using every method I could find including cranking my room heat to 107 to kill the mold spores in the room, milk solutions, high ph water spray, Serenade (smells like ass), and even purchased a suflur burner and didn't have to use it. I finally had success using Exel LG. I run full aero system and when the plants are moved from veg to flower i let the roots sit in an Excel LG bath. According to the directions the correct solution is 1oz Exel LG to a gallon of water ph adjusted to 5.8 and let sit for 2mins. This didn't resolve my problem immediately but in a month or so suddently all traces of PM are gone.