Any clues?

LongsPeakstate · Jan 7, 2021

Yellow spotting. I ph, use cal mag, ffof, perlite also added some organic autoflower super soil. Just started happening past few days.

MustGro · Jan 9, 2021

Not nitrogen. I did a quick search for yellowing cannabis leaves https://www.growweedeasy.com/why-cannabis-leaves-yellow
I wonder if it's an early iron deficiency?