RQS - SweetZZ

Hello mate, for my experience the condition of your leaves seams like a problem with the rate of Calcium and Magnesium in your water; when you use organic product you have to be careful about this rate, you want it in the range of 3-1 or 4-1 Ca-Mg. I noticed that until you are in the veg phase you haven't issue, after one/two weeks of flowering the leaves start to be like yours, crunchy and with some little brown spots; i didn't solve the problem until i checked the rate of Ca/Mg and fixed it in my tap water. I hope to be helpful, good luck and happy journey!!

I would calm down with the nitrogen and consider adding some calcium.

This is the beginning of nitrogen toxicity from being way over fed.