Hey Nas, check this out and bookmark these two pages.
GREAT information. Pretty much every single thing that could possibly go wrong. It also talks about how PH levels correlate to different nutrients, and micro nutrients. It will say at what ph range the nutrient is locked out (locked out means it wont be absorbed by the plant) I'm guessing you
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http://www.icmag.com/ic/showthread.php?t=11688
https://www.rollitup.org/general-marijuana-growing/1469-marijuana-plant-problems-cures.html
Here is a guide to pest/infestation problems (I may have sent it to you):
https://www.rollitup.org/bugs/335046-grizzlys-guide-pulverizing-pests.html << You should bookmark that too, great super informative thread.
But your problem looks like a cal/mag deficiency. Maybe phosphorous. Or a combination.
I'm not familiar with the nutes you listed to be honest, but some if not all appear to all be boosters of some kind? Like additives?
Are you using base nutrients? I'm talking about nutes with different levels of nitrogen, phosphorous, & potassium + micro nutrients?
It also looks like your plants could use some nitrogen, they should be a DARK healthy green. A few look a little light on the green side, some are slightly darker but could still be darker
This is the time you should start boosting the basic nutes slowly, they are ready to kick some SERIOUS ass in flowering. You will see some HUGE nugs just wait til they fatten up, they do some serious growing in the last 3-4 weeks and start getting fat as fuck around that time. Your using molasses too yeah? Your plant will love some molasses right now. 1tablespoon / gal or......... 1/4 tablespoon per liter, do it every other PLAN water watering. You should be doing nutes/water/nutes/water right now but you will want to do nutes/water/nutes/
molasses+water/nutes/water/nutes/
molasses+water get it?