Diagnosis Help

I was wondering if anyone could help me diagnose my current plant issues. I originally believed it to be a pH flux however stabilizing the water and nutrients pH(to pH6-7) did not help said issues. Some info:

*Indoor Grow
*Watered via lift method(1-2x weekly). Alternating nutrients(Fox Farms Big Bloom) every other watering.
*Fox Farms Ocean Forest Potting Soil growing medium
*Flowering Stage(1 week in)
*Lighting is 2 CFL (3800 lumens each)

You probably don't need to add fertilizer with FF soil. It has fert in it already. Maybe get a sodium light if you can afford it, and think about transplanting to 5 gallon or bigger.

Is it just on the very bottom leafs? I wouldn't sweat it if so. Your plant looks healthy from what I can tell.