Amnesia Auto - 2nd grow

The leaf problem (whatever it is) I'm having started at the lower leaves and have moved up to the middle level leaves now. It's getting worse so I decided to flush it again. The runoff ph was around 6.3 which isn't too bad. I was hoping for a wrong soil ph that could explain the cause of my leaf problems.. so I'm still in the dark here. After the flush Am2 stopped the damage and continues to pack on the buds. Did some defoliation on dead leaves. I wanted to cry at this point but it gets worse next week. Am3 was exempt from this problem luckily but it is stunted from the transplant. Am3 flowers faster that the others not sure because its because of its stunted size or the size of the pot is only 3gal vs others' 5gal. Week 8 —————————— Mon 16 mar - 3.5L ph water flush. Toxicity on all the middle level leaves now. Getting worse. Need to empty the tray and flush hard. Tues 17 mar - flush am12. Am2 nice roots at the bottom. Ph water. Rest a few days. Am3 given superbud nute 1L 🌊🌊🌊 Thurs 19 mar - am12 ph water 2L + superorg 1L, Am3 superbud organic series 1L. Am1 still getting worse. Am2 damage stop already. Sat 21 mar - am3 trichome still white. Am3 flowerfuel 1L. Am12 ph water 2L. Am1 still rotting but slower. Sun 22 mar - am123 all damp soil so wait a bit.