Discolored leaves

I get where you're coming from, but to me it looks more like a magnesium deficiency than a buildup. The interveinal fading and purpling is pretty textbook Mg, especially around week 6 of flower when demand spikes. If the buds are still swelling, I’d lean toward a light CalMag top-up rather than backing off completely. Just my take – could definitely vary by setup.

Hey there don’t worry to much the plant is not lacking anything. Some of it is genetics but also sometimes when you give to much calcium mag mag with a flowering nutrient this happens. I think it’s from to much nitrogen. Personally I would just water without nutrients the next time and maybe the next 2 times. Honestly don’t worry the plant will be fine. If it countines way worse and starts to make the leaves are crisp the. You can flush the soil and wash out some of those nut …