Well I see pH fluctuation which is a type of stress which will effect yield, the wrinkled leaves along with the cupping down now from stem to leaf tip (mimics over watering at this stage). It is important that you always use the same pH'd solution when watering your plants. So for example you do not want to use a little Cal Mag Plus for one watering then a little Molasses for the next watering. Ideally you would mix everything into your solution each time you water, but use smaller amounts of each thing. So if you give a teaspoon of molasses per 5 gallons of water every third watering change that to be 1/3rd tsp of Molasses every time. Some strains aren't affected by pH flucuations, such as but not limited to ACDC 20:1 CBD:THC super pain relieving super weed. <=== that strain is just hungry
Also you can just set pH then water them whatever you want. The above way is just easier on the gardener.