I'm in a 4x4 tent, 650 watt 6 bar light, 4 oscillating vivosun fans, Terra bloom 6"exhaust, 70/30 coco perlite, advanced nutrients cocos synsei.
The 40 gallons was over 2 days. I tried with a couple gallons at 6.1ph, 300 ppm of a/b and a few hours later with a few more. Numbers didn't budge. I...