What happen

Not enough fresh nutrients at the root tips.

Check your run of ph (should not exceed 6,5) and adjust it if needed. When you've adjusted pH and you've created the right environment for her roots, give her normal npk because she def needs N (yellowing) and K(purple color on leaves ). Always check pH and ec of your irrigation water

Hi Bro, your girl is totally overfed, the leaves have claws and are pale, which indicates a nitrogen lockout. You're giving her everything, but she can't take it up. Best to just give water with enough runoff for the next 2-3 times. Good luck and success 👍

I don’t know my arse from a humidifier, but since it looks like it’s just the top leaves, it may be that your light is too close to the top of the plant. Looks like light stress