Auto AK47 Beginner

Beginning of week 9: Not much to say, I tried to tie it down more, so the buds get more light. Still re-adjusting the deficiency. Upped the light from 18h to 20h End of week 9: Thanks to the tips from you guys, I think the deficiency signs came from me adjusting the pH of my water too quickly. The pH of the tap water here is 7,7, in the beginning I used lemon juice to get the pH down, but it went down to 7,0 max - I then started using pH down and adjusted to 6,25. I guess the plant was shocked 😲 Not a lot of growth this week, at least the problem didn't spread.