Amnesia Haze Auto. Second Grow

Overall the plants are doing well. I topped on Friday, three days ago. Apparently they didn't suffer that much. Now just water and maybe some defoliation later. We will see. #1 and #2 - They are doing well #3 - Her leaves are showing signs that, based on my research, appear to be a lack of magnesium. I gave epson salt today. I will follow. #4 - It entered pre-flowering today (day). I made a small LST in addition to the topping because your vase is a little taller. It's causing a bit of a bush/forest smell in the room. Time to put the activated carbon filter to work. In Brazil it is not yet legal to grow 😬. #5 The little sister had some problem with the soil, which is different from the others. The leaves turned yellow and even though it was 5 days younger it should have been bigger. However, since the middle of the week she has improved. I gave her Epson salt. I was afraid of flushing and drowning her. This week, if it doesn't evolve, I'll try to measure the pH of the runoff to try to better understand the problem.