Please need help with diagnosis

Can anyone help with this plant, I think from what I have read it is a Potassium deficiency....
Please all opinions are appreciated. Its is indoor, in soil less soil, xnutes, and I water every other day. I have six plants this one is the only one that looks like this, its Sleestack Skunk. A free bonus seed.Thanks so much!
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over a hundred views and no opinions......

Heat stress in my humble opinion at least. And what nutes? Is X a brand or you are not using nutes or . . . ?