Hey, buddy! 👋 Your pH is normal, everything is fine with the soil acidity! But check out how part of the leaf has curled, and the tips have changed color. This is the beginning of a phosphorus deficiency, and such changes can happen on other leaves too. Most likely, you're using soil with high nitrogen content and low phosphorus content. It's time to start adding Bloom nutrients in a 1:1 ratio with Gro nutrients! 👋 But start with half the dose recommended by the fertilizer manufacturer for the vegetative stage! 👌 Good luck, buddy! ✊😇