This is my second plant in the grobo. She’s a Bruce Banner auto. Today is day 24 and 14/14 of early vegetation. She has these brown discolorations on all her leaves. Water change was last Sunday.
I have had this happen on a couple grows with autoflowers. Mine was a cal/mag deficiency looks the same as what you have going on. As my plant got bigger the issue went away I did manually add cal/mag to mine.
By chance did you do a ph probe clean and calibration after your first grow?
No I did not clean the probe or calibrate it afyer my first grow.
Definitely recalibrate the probe and clean the ec.
You might need a cleaning. Also might just want to submit a ticket to support. They will help you with it if you need some assistance.
Good luck. Happy Growing!
Winner winner chicken dinner @AandM-farms! You took the thought right out of my mind. This is the 1st thing support will ask you as well.
Use the pH cleaning and calibration kit found on www.grobo.io and use the new calibration feature in the app. Then a quick drain/fill and you should be back on track.