Heat Stress or Potassium Def???HELP!?!?

idk if its heat stress or potassium def, but idk how it could be heat cuz the temps stay below 84-74 durin the light period, and idk about dark, and the light is pretty far away from her cuz i gotta 400w HPS and its about a foot n a half away from her right now, i keep havin to move the light up cuz my girl is gettin tall. shes 36 inches right now i think, and showing budding sites, also im 14 days into flowering, idk if ne of this helps, but i have a ok lookin pic to show you what its lookin like. ill have to get a better one tho later when i have a better camera.

so i took some knew pix, maybe this can help you guys with deciding what i have so i can cure it, thnx

NeoAnarchist said:

so i took some knew pix, maybe this can help you guys with deciding what i have so i can cure it, thnx

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You're flowering, so that is Mg. I would hit with some Epsom salts just to give her extra trace elements. She already has taken on the Macro nutes(N-P-K). KEEP SMOKE ALIVE!!