Help in week 1 flower

hello folks. Well I started a new run after a year on the side lines. Everything has been great up until the beginning of flower. I have a dtw set up automatic feeding 2 times a day 1 min increaments. I am using ro water and heads modified Lucas formula 6ml/gal micro 9ml/gal bloom. I use 2ml/ silica which I add first to get my ph at 5.8 and 710 ppms I am using co2 between 1400-1600 ppms during lights on. Temp during day is between 78-80° w rh from 60-68%. I have some almost burning and growth has stopped almost all together. The leaves are almost getting yellow. Any comments or help is much appreciated

Drop your CO2 way down. Those temps are too low to push that high of ppm. Maybe 400ppm and see what happens. Too much CO2 restricts N uptake as well.

3rd Monkey said:

Drop your CO2 way down. Those temps are too low to push that high of ppm. Maybe 400ppm and see what happens. Too much CO2 restricts N uptake as well.

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Thanks buddy. I dropped it was down to stop at 450 and they look to be not getting any worse so I’ll keep on eye on em. Thanks again.