HID light grow ops, use lower EC levels. Because of this moist burning IR.
Because the plant engine run allot of water they also take allot of nutrients.
In LED ops, this is where it differs. The burnoff of heat radiation is not there so the ec levels need to be 25% higher, minimal.
The plants i see from you pictures. It starts with the VPD error … and there is some light stress going on.
There is a Mg shortage, because the plants do not uptake enough nutrients overal, also to few micro’s.
As long you not get in control of the VPD and PFD, no matter what nutrients you use, how much, … the problems will stay.
K shortage is tricky, add more and you will block other elements.
Start with the basic climate and light power and stabilise first.