I would drop your pH to 6.2 and add some calmag while reducing your Biogrow by half. She's probably starting a calcium deficiency .... usually brought on by either a nitrogen toxicity locking out the calcium or your pH being too high (yours really isn't but 6.2 would be a better reading for calcium absorption)... From the looks of the photos, though, I don't think you have a lot to worry about.... just a slight adjustment... wish you had a diary for this grow! She looks to be very interesting!
Good luck!