Please help yellowing in new leads after fimming

I fed them on the 16th and they were fine then fimmed them on the 17th then watered them without feed yesterday when they got dry and this started to happen on two of them today when I got up, no signs of this in the others.

Please help.
Some have said I should lower my ph more the feed is around 6.5 and my watering was around 6.6 I think cause I just found out my monitor wasn’t calibrated correctly.
Other have said to add more nuts?

I made a slight mistake that one plant on the bottom wasn’t fimmed it was topped and on the 13th that was done

dont worry, shes gonna be ok. If you have it in soil 6.5 to 6.9 ph is totally fine.