When did you start giving them nutes, looking at your smaller plant i would have said she was hugnry for N. I've grown a lot of AKRs and some have needed nutes a few days earlier than others, the earliest i had N deficiency was 10 days, gave her 1ml/L and she was fine within a few days.
Really hard to diagnose the various deficiencies but she's def looking better now so good call on the flush.
steely