Couple things.
Get some calmag or epsom salts, mix up a weak solution in a spray bottle, give a nice mist to the ladies. Even BETTER, use GH Micro as a foliar spray, diluted nice and weak of course, with a small PINCH of epsom salts added (Mg def is your primary symptom). And one drop dish soap for sticking.
Yes, your soil pH is too high. You will want to make your next feeding at about 6.5 to lower it back into range.
Your leaves have the appearance also of being root-bound. Remember 1 gallon per foot of main stem. Fresh light soil is a beautiful thing!

If that combination does not help, start looking around for other odd stuff going on.
Do you grow near a furnace exhaust that may be leaking either exhaust or fuel fumes?
Have you painted, caulked, fumigated, etc in the grow area recently? What did you use?
Is there a HydroHut tent involved, oh say about 1-1.5 years old, purchased in Cali? (Google Hydrohut Syndrome)
We will get this fixed.
stinkyattic Reviewed by stinkyattic on . Help day 13 flowering Pics sickly My plant has not been looking so good recently. it is an AK47-Superunk cross. Day 13 of flowering when the pics were taken a little while ago. Im useing Botanicare nutrients. Right now its getting 30ml/gal -Botanicare- Flower 10ml/gal - Botanicare - Sweet citrus 1-2ml/gal- Calmag Rating: 5