Apparently she's going well.
I will keep an eye on the small color difference that's starting to show up no the leaves.
Could it be a pH issue? I'm using apple vinegar to bring the pH close to 7. The water from my tap is measuring around 9-10.
Hello fellow grower 👋 Nice start you've got there!
PH 7.0 is a bit too high for iron to absorb properly. Looks to me you have a small iron deficiency going on. Adjusting PH to 6.5 should be the first measure to take and if that does not help, most of the cal-mag products contain iron in them. I hope it helps your grow. Best of luck and happy growing!