Hi friend, when you add your nutrients do you supplement PK or CalMag? In hydro if you ask me it's a must no matter what base nutrients brand you use...the burned leaves look a lot like PK deficiency ๐ค
@Ringo, LED fixtures tend to excrete from the plant the Cal-Mag also for DWC it's a must. My Guru i observe on the YT always stresses the importance of supplementing PK in flower stage...before I used only Cal-Mag but since I also use PK my plants look much better.