I know no pics doesn't help but I've got 6 blue cheese fed from auto pot but the smaller 8.5 L pots. One plant has all dark green leaves, another is half green half yellow and the others have loads of all yellow leaves with one or two leaves that have twisted.
I'm feeding them vitalink nuts as the chart says.
They are 5weeks into 12/12 ,just wired how they all take from the autopot reservoir but some are all green an others have all yellow leaves.