Please have a look at the coloring of this plant. ...

I'd say iron can cause that yellow new growth also, but you have a solid nutrient trio. So my best response would be to raise the ph to maybe 6.2 6.3 a few nutrients are better absorbed at that 6-6.5 range and maybe being at 6 is going a tiny bit low....I hope something works out. Good luck with the battle ✌️

Your Girl has alack of Nitrogen. The causes are multiple either she cant absorb it( problems with PH), or you have root problems, normally the ppm would be enough for the Girl.. Did you check the PPm of your water= ? without nutes=? My guessing is that your water got a high ppm and so the added nutes are not enough... . Use destilled/ osmotic water do your same mix and look for ppm now....As i said there are seceral possabilities... and got to chek one after the other, at first i would look for the roots, themn for the ppm of your water.... I hope you get a solution for your probs