Here are the pics. Any ideas? My guess is the PH, 'cause I'm doing the exact same thing as I did about a year ago, and the last crop was fine. But you're the experts
P.S: When I said 16 hours, I meant 18 hours... I was baked when I posted the thread hehe. And will changing from 18 hours to 24/7 confuse the plants?
Thanks in advance.