Day 8- this girl is comin along, gonna have to get some more soil soon so I can transplant her after this week. I might just scrap the KTF Orange because those genetics kinda sucked anyway, too many plants with mutations.
I believe this is potassium deficiency.
K deficiency causes internal temps of foliage to rise and it causes the protein in the cells to burn and degrade. Usually happens on the edges of the leaves.