ok, you have bad ph. The plants in the first pic' are clearly overnuted, and the second are sufferring from deficiency. Complexing, i know especially as you've most likely been feeding them the same way.

Which is why this is a ph problem. The ph of your medium has reached a point of lockout. In trying to correct this problem you have most likely treated for deficiency in the first set of plants with correct ph and severely overnuted them.

I can only imagine you have tried the same thing with the other set, only that the lockout has saved them from the same fate.

The first set of plants may take 2 weeks to recover which is a lot of weight lost, after flushing, and plain ph'd waterings.

The second set will recover quite well after a normal ph'd feed. How have you managed to get here? Do you have a ph meter?