Plant #1 is showing some leaf discolouration. Not sure if it is nutrient burn/lockout or deficiency. I flushed her with R.O water just in case. Any ideas or suggestions? She's an odd one anyway, seems to be a different phenotype than her sisters.
The burnt tips are a sure sign of over feeding. The dark green foliage shows excess of nitrogen. So, yes stop feeding. Actually you should have stopped at least a week ago.