Northern lights 200 watt test

My little hiccup of not getting the plants the nutrients seems to have carried over into flower and I believe I have a little mid flower nitrogen deficiency. Usually in weeks 3-4 I cut back to one teaspoon of flora gro per gallon but it appears to not be satisfactory for these ladies. I did a water change today and added more in and we’ll see if that does the job and stops these leaves from yellowing. Oddly enough the same goes for both strains in different tents.