2nd grow -need help

400w hps swiss cheese soil grow using biocanna bio flores/should be for flowering,but worked well on last grow.She is 5 weeks veg/good air intake/extraction. Temps 77f-80f.Is it lack of nutes or could it bee cold air intake when light is off.Quality of pics not good.Would appreciate all input.ty
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23 views no replies ,nobody knows. (tick-tock) still waiting.