Hey, buddy! 👋
You have a Magnesium deficiency due to too high Calcium doses in your watering! Always keep in mind, if you're using soft water (250ppm and below) then you should add 1ml/l (cal/mag).
If you have hard water (250ppm and above) then use calmag supplement as needed, up to 0.5 ml/l! 👆 I write PPM in a 0.5 coefficient for ec! 👆
And lower the pH to 6.2-6.3 for soil when the plant is in the vegetative stage! Your pH of 6.5 is good for finishing flowering, not for starting vegetative growth! 👆
Good luck, bro! ✊