SOIL Under or over feeding? pH problems?

[DJsublimeATLinCO]

Is the yellowing I’m getting from over or under feeding? I’m running advanced nutrients (yeah, I know) sensi bloom A&B, b-52, big bud, carbo load and over drive. Im feeding at 2ml/liter on all. I’m on a FFW schedule and on water days I’m adding cal mag and Pure Blend Tea. Ph is between 6.1-6.4 going in and 5.8-6.4 coming out. Ppms are currently 950 on feed days and 380 on water days. Growing in Pro Mix in 5 gallon pots.

Last run I had 3 nite lockouts so I’m being extra cautious this run.