Leaves damage: PH levels from nutes?

yes, fertilizer impacts pH. you need to pH it after you mix everything. Then, determine if you need a ph-up or down for any final tuning relative to your tap water. luckily, my ferts get me to a great pH range. When i add water only, i know i need 3mL of vinegar to get my tap down to a decent range. 8.1 is likely the bigger problem, if you dosed plant with that alone at any point. tossing drastically varying pHs on it isn't the best practice, either. Try to keep it all near the same range. Some small sway is good. acid/alkaline environments are equally bad when out of range. marijuanna likes slightly acidic, but still can go too high or low, regardless.