Mephisto Genetics - Blue C-Birdie - Indoor

This week started well and although I would also describe the growth of the plant as good, not everything went optimally this week. Growth this week has clearly concentrated on the buds. I haven't taken down the low branches yet, although it's getting very cramped in my small tent. I continued the light defoliation slowly in the first half of the week to improve airflow at the bottom of the plant. In the second half of the week, I noticed that the plant had slowly started to droop its leaf tips. On Friday evening I noticed that many of the leaf tips had burnt during the day, so I decided to water again straight away. I can imagine that this was caused by an incorrect pH value or too many nutrients. The last time I watered before, I adjusted the pH value again to approx. 6.5. I have only been doing this irregularly for about 3 weeks as BioTabs advertises that the pH value of the water does not need to be adjusted and I have now read several times that it is not necessary to adjust the pH value when growing organically (dont take that as a fact from me, but it seems like with my conditions the plant likes normal/unadjusted tap water a little better). The plant has responded well to watering/light flush and the clawing signs are gone, but I'm not sure yet how to interpret the slight yellow tones on the sugar leaves on the top bud.