is this normal??

Do the first 1 fingered leaves generally die off or am i getting a deficiency of some sort?? thanx for any help
its the second week in the dwc
bagseed
ph 6.0
vita link max nutes at 0.5ml/L
BB

You are using the full strength amount. I would cut back and see if your yellowing gets better or worse. Are you using the hard water formulation in water that is too soft?