Hi bro! I've seen your data sheet,7.5 ml/litre of nuts seems very abundant to me, even the 4ml/l of rooting agent is excessive, I've had unpleasant mutations exaggerating with that, but it's not your case.
The next watering I would give only water, then resume with the doses written by bio bizz (in slightly smaller quantities), also evaluate the purchase of an electronic EC meter which is cheap (25€) and I find it very useful. I use it more than that of the ph meter.
Overall your plants are doing well! just a slight overfeed.
Byee !