Having persistent yellow/brown spots on my leaves....

I think the tiny spots on the leaves look like potassium deficiency based on this chart: https://i.pinimg.com/originals/e2/05/6c/e2056ce8d69e1b814dc52a779c6c109a.jpg

Hello @lezhonka! What you have is a slight nitrogen toxicity and a calcium deficiency. Two possible reasons for that. First because of too much nitrogen the calcium can't be absorbed ( very common thing to plants with excess nitrogen ). Second the PH is wrong. How often you replace the water in the bucket? What you need to do is first make sure to calibrate your PH and EC meter ( a lot of people forgets to do it and they taking repeatedly wrong measurements ). Then measure the PH into the bucket. If the PH is wrong replace with fresh water at 6 PH and 1.6 ms/cm ( 3.27 ms/cm is way to much even if you were using AN) . If the PH in the bucket goes out again very soon you can tell me so we can find whats causing that ( there is no reason to explain you what can cause this if you don't have that problem since it can be to complicated some times ) or you can ignore it and start changing the water very often. Also you need to stop using floralicius because it gives more nitrogen and you are close to harvest. Happy growing ! 👍

Wow, that's some strong nute solution. Dial back the nitrogen, your foliage shows signs of nitrogen toxicity (really dark leaves). As for the spots, do you notice that the affected leaves are the ones on top? That means that it's an inmobile element issue, in this case calcium; I suspect nutrient lockout, both phosphorous and potassium excess can lockout calcium. Good luck