Fastberry (2Fast4Buds)

PH is high again. I made a solution of 6.5 to reduce it to this level, but it seems to high. As @MrJones wrote I should target to much lower level like 6.2. At the end of the week, I started making a solution of 6.3 to reduce the acidity of the soil. The leaves continue to turn yellow and apart from acidity, I see no other reason. In general, I am not worried, since the harvest is coming soon and this should not greatly affect the harvest. Compared to my previous grow, it looks just great.