AsNoriuanswered grow question 3 years ago What you put in ?
If you put 6.3 and get this - pot inside pH too high, does not absorbs certain elements
Wrote huge text for you, but internet crashed
Think pot is around 7.0 , EC is okeish, but they look hungry ...
Root bound or wrong nutrition schedule or watering regime
Hope you lift pots personally and water only when they are light ..
2-3 full cycles wet/dry only pH 6.3 water with 0.25 ml/l calmag
Other girl looks suspicious too...
Make sure that you pH pen is calibrated and shows real numbers too