Peanut butter zkittles x mac

Ran out of general hydroponics so switched nutes this week. Complete clean and change-up Sensi Coco Bloom AB. They just add more calmag to the sensi coco bloom so no harm. Now I personally don't like advanced and think their ph technology is garbage. Anyway went with the website for my rez 160ml a and b each. Put me at like 800 ppm. 5.6 ph. A day later ph is at 6.3. One day later 4.9. I used ph up to 5.8. Today 5.5. Seems to be stablizing. The smell.....is like no weed smell. I see where the peanut butter comes from. Noticed some dying leaves. Very bottom of the plant looks like nute burn but its so random. Pulled off leaves will keep an eye on it.