i have had probs with powdery mildew aswell and have for the last three weeks been running a sulpher burner for 2 to 4 hours a day during lights off period
I am a newbie grower with not much luck but learning the hard way all to aften almost ready to give up
i run 10 600 watt hps with electronic ballasts
i have ten inch intake and 12 inch exhaust
i use white poly on all the walls
i have two 4/8 tables with soil running 30 plants a table
when i veg...
i beg to differ with you a magnetic ballast runs at an average of 8 amps where a digital runs at 2.5 amps cutting down on heat and hydro thus saving you money in your over all costs... another thing i learned was that for roughly the same price in hydro you can run 2 600 watt digital ballasts...