Quantum Boards burning plants.

unfiltered said:

I usually don't take pH reading but did for the bigger plant due to the issue. It was on the acidic side for sure. Like I said above, I think the bigger plant got both light burn and nute imbalance (i.e. low pH, lockout, nute deficiency).

What I am interested in figuring out is the light burn.

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That plant on the left looks locked out, possibly from something you've added, If you don't have a clue of what it could be, I would just give it a nice watering of compost tea and hope it corrects itself, still your chances are better by telling us what you've added & how much.

I'm wondering if your root zone is starved for oxygen. How damp is the soil? If you have a lockout from pH or whatever she want be taking nothing from the soil and it want be drying out like normal which will lead to root issues/root rot. Not sure your VPD would cause anything as detrimental as what you've got, but I believe it will compound the issue. Just opinions as we're still learning how LEDs, VPD, Spectrum play together.

Did you ever get this problem under control?