i need help fast and i heard u r the guy

strand is white widow flowering 4 wks 7 wks old and 3 1/2 ft tall use 2, 1000 w/hps for flower, 2,1000 w/mh for veg using a suncircle co2 is @ 1500ppm to 1800ppm ph 5.8 to 6.2 nutes 700ppm veg increasing to 1500ppm, flowering @1500 to 2000ppm, using rockwool, watering twice a day 45 min thru 1/2 gal an hr emitters in a 10 by 10 room, mixxing nutes at 1/2 to 3/4 strength using flora nova for veg and flowering sm 90 big bloom 0-10-10 and cal/mag, venting every 2 1/2 hrs temp @ 70 to 85, humidity @40 to 60 pics r all of worst symptems except for one overall view and one single leaf pic which shows beginning stage i thought mag locked out due to calcium od flushed 4 days a go and foliar sprayed w/ epsom salts getting worse worst plant has browning and cracks or crumbles to touch stressin please help

ok pictures wont post will put in album on profie for u