I have done hydro sog under 4 600 watts yeild a little over 2 lbs. I have done scrog soil 2 plants under 1 1000 yield a little under 1lb. I have done auto's in soil under t5 abt oz per plant. I have done 5 outdoor soil 6 foot plants over lb per but lost due to but rot. I have done hydro 1 plant per 1 1000 with 14 1000w lights over 1lb per plant. I have done ALOT of growing! I have never done a closed room where no fresh air is coming in and no used air going out. This time things are totally different. Im growing with the sun but in a wallipini or pit greenhouse and I want to manually add c02 and 02 I am flowering at 18" and giving 3foot spacing. Manicure will be top at every 4th node and lolipop. grow space is 30x20. Air conditioner and dehumidifier for climate/RH control. Grow medium Soil. Im looking for expert advice from EXPERIENCED closed loop growers. any questions just ask. Thanx in advance!