Hello fellow rollers !
Just to be sure if I diagnose it correctly.
Is it K deficiency ? (and maybe some Mg?)
Lights - 150 cob led
Temps - Day 80 F, Night 70 F Humidity 50%/70%
Medium - 2 gal pot, Organic Soil Light mix biobizz
Nutes - Biotabs + Biobizz
Water - tap water 200ppm
Ph - watering...