Leaves rotting or something

hps lights, promix bx medium, 35-55% humidity, week 4 flower except last picture-last week of flower. Foxfarm big bloom, tiger bloom, great white mycorrhizae, dyna-grow foliage pro, 6.6-6.8 ph. Strain - Maui Wowie and last pic is ogkb 2.0

First pic looks like you need to start feeding more or heavier

that's a mouth full of fertilizers and mixed brands

which is fine if your mixing it proper

how are you mixing the nutes?
you've got 2 bloom booster there

they look like there N def and judging from the two bloom nutes your using I suspect you mix is off

give me the npk % amounts for the foliage pro and the calcium and magnesium % also

what size pot is that?