I am in the 8th week of growth. I am aero/hydro 1st time grower. I dump my nutes every 7 days, flush with fresh distill water for 24 hours, than add my flora mico, flora gro., will be using flora bloom in next d/f A couple of days before I reach my next dump/flush, I get these brown spots on my leaves. PH is at 5.8-6.1, plenty of lights, CFLs, about 4" from top of plant. Great ventilation, no CO2. I do spray the folage w/distilled water every other day. Is spraying w/lights on causing the burn spots? or a Mag/Ca problem?