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 (25âŹ) 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 !