Hydro harvest w/root ball, DWC, bubble bucket

First time trying the DWC or deep water culture ( I think they call it) or Bubble Bucket method of growing.
4'x4'x8.5' silver mylar lined closet, Approx. 3-4 weeks, 18hrs/day under 400W metal halide for veg and Approx 8 weeks, 12 hrs/day under 400W high pressure sodium for bloom. Tower fan for air circulation, Temps 68-72F dark, 78-86F light. HESI Hydro nutes, CO2 added twice or thrice daily, 7 second burst at 60 cu.ft./hr on the flow meter for a total injection of .15% closet volume or approx. .2 cu ft. (be careful with the CO2! You can overdo it and ruin your crop as growth just stops)