ok, my last harvest i veg'd for only a week and only got a half lb off of 67 plants?
This time around i veg'd for 3 weeks and they are now in flower. ive got 47 plants so i'm hopin on 3 lbs. (i'm legal and everything, i have 4 cards for 12 plants so i have to stay under 4

.
The only thing i'm missing is a form of co2 in my room. My buds are fluffy. I want them to be dense and big.
I use greenfuse bloom stim, ionic bloom stim, and bud candy. I PH my water to 6.3~, and they are under 6x 600 watt hps in flower.
Am i doing anything wrong?
Any suggestions?