Watermelon Candy 40x40x140 the second grow

It finally started to bloom. It really looks healthy, just a little yellowing on the tips of the young leaves. I think it's a potassium deficiency. Hopefully I can fix that next week. This time I started with 8 branches. In my first grow, I started with 12 and that was too much for my small tent (40x40x140). I cut the first floor (I mean the two first branches that sprouted). I did this because I noticed that they used a lot of energy to grow. They never had enough light and their flowers were the smallest