my friend is growing hydro been in for about two weeks he feeds tham evey half hour off and on.hes got 2 1000w hps 2 feet away.thay havnt got any new roots or new groth and there starting to go yellow and some are dieing.thay are on 18/6 if any one can help he dosnt really no whats hes doing.thanks
https://www.rollitup.org/hydroponics-aeroponics/174556-plant-going-yellow-hydro-help.html#post2254413
https://www.rollitup.org/hydroponics-aeroponics/174556-plant-going-yellow-hydro-help.html#post2254413