Diagnosis please??!!

So I got a little problem I'm not to sure what it is maybe you do!

Well here are the pics

Had all lush green stems and leaves
New growth seems fine mostly effecting old leaves. I'm using LED lights.

Try some Cal-Mag, im sure thats the prob

old leaves are old leaves, if no other growth shows issue, its just an old leaf, begging to be removed by you, instead of mold or pests.
I cut old leaves off as my plants mature every time. Nothing you add will ever make that leaf look normal and photosynthesize properly again, I bet a prize Stardawg cut on it.
because its old, its root system is degraded and it doesnt matter.