Yellow Lower Leave With Couple Black Dots Autos

Autos they are blooming from about 10 - 14 days now, few lower leaves yellowing with couples of black spots
soil Ph is 7 i water them with ph downed water of ph 6

cut that silly leaf off already, geesh. its not photosynthesizing anymore, your plant is embarrased it sticks around.
ever see the color of sticky pest strip....
lower leaves are shed often as a plant matures, less light, less love no worries

its N def
a little N def in flower is ok but you don't want to let it work its way up or get worse since your still early

on the other hand, don't go and drowned your plants in N becuase itll mess up your shit

how are you fertilizing .. with liquids? what kind how much?