Update, seeing progression on the burn. Have been watering every Sunday the last 2 weeks 150 ml of bottled water. Last watering was last Sunday and I felt I may be following the less is more rule with the water too closely (possibly drying them out due to my specific location) so I watered again today, bringing the watering schedule closer by 3 days due to their growth. I felt the weight of the pots and it's been hot recently despite the temps in the tent being maintained by central AC. Temps in the 75-78 range. RH usually stays in the 40s it's dipped into the 30s at certain times of the day. No nutrients yet.
Watered today with pH up and down adjusted bottled water.
This ones doing the best, thicker stalk than the other 2, growing faster, did nothing different with her, same soil, water, regimen, strain etc.
2nd plants progress is close to 1st, more burn on her, slightly shorter than 1
Third plant, you can probably see it's shorter than the others if you look at where the handle is in the 2 pics (1 and 3) relative to the plant. I'd go as far as to say that compared to the growth levels of the other 2, this 3rd plant is stunted. It's shown most of the burn out of all 3.
I've asked around on different forums and just got more suggesting it's common FFOF burn as dank and enduro have said. Something off with the Hanna pH meter maybe. In this pic you can see the vial reads something closer to a 4-5 pH range whereas the meter tells me it should probably be greener. Bad pH meter? I made sure to pH dye test w/ the vial and watered the plants with pH up and pH down added. I took that 6.4 and orange reading and added some pH up till it read about in the higher 6.0 range, light green.
Do you think it's getting to the point that I'm going to have to cut the top soil with something to dilute the potency of this FFOF to save the plants?