What is this on my new growth? Help

[Sherbz420]

So i came 2 check the girls 2dsy and spotted a lower branches leaves on the new growth are yellow now it dont look like nute burn this looks like a difficency and im not sure what i was planning on switching lights to 12 12 but im gona wait another week now and make sure they r ready

Sherbz420

 

[Sherbz420]

Phosphorus difficency?? I think... Not 100% but thats my first impression from the look alone idk tho any help would be greatly appreciated...

Sherbz420

 

[Sherbz420]

Same plant kinda looks like a bug problem im afraid of that id rather an eazy difficency

Sherbz420

 

[Sherbz420]

This was ph problem 2 high i thought it was fixed but it got worse cuz of the advanced nutrients saying its ph perfect is bullshit u still have 2 check it as always

Sherbz420