Brown patches on Leaves

Well to me it looks like light burn, you can see the stem is all red because of high antioxidants produced in plant to protect against high infra reds and red leds...This should show only when in the flowering cycle week 4 . I think your plant needs to be under lower light settings than she is now. She is going to need 1 + week to recuperate but finger crossed maybe she will just keep on growing like nothing....just keep lights on low or higher above canopy. Good luck!

Yes in soil you want a ph of 6.5. Too strong of nutrients has lowered your pH. Plus if you are adding nutrients throw the run off out. You are having a salt build up from not enough run off which is causing havoc on your soil ph.

Heres the actions i took upon my discovery: - Recalibrated my ph meter - did a slight flush untill i saw the runoff had a more acceptable ph - re added some of the nutes i had now flushed out Is hope this fixes the issue over the next couple of days

I think i found the culprit, i just measured run off ph, and it was lower than expected (5.8-6) where as I put in 6.6 this time. I may have used to much ph-down with the last watering causing a lockout of some sort. Any thoughts?