Critical LED

CO2 bag installed One girl showing massive growth and large stem, the other three lagging behind a bit. Topped on 17Jun (after taking pictures). When topping, the fast lady had actually developed a full node more than the others, we will see how that works out. The big girl was topped above the 5th leaf set, the smaller above the 4th leaf set. LST next week or when the new shoots start appearing for real, will try 4-way LST and then into SCROG before switching. I turned up the light to ~20k lux beginning of the week, and to 30-35k mid-week. Noticing some discoloration between the veins of the three slower girls, tried feeding a bit of calmag and pH6.5. on 17Jun. 18Jun - I think it's heat/light stress. I raised the lights from 45cm to 65 cm and dimmed to 70% giving me a lux of 20k at plant height. It's pretty hot in there too, running at 28-29 degrees during the day. I may try and mount the LED drivers outside the tent as they run pretty hot. Will feed with GROW for first time tomorrow just in case the yellowing is a nitrogen deficiency starting...