I too am worried about leaves turning yellow

I too am submitting a pic to what I am worried about.

The lower leaves on one of my plants is losing yellow leaves like crazy. I am sure it is a sativa strain.

Second plant is indica and it's fan leaves are slightly curling o nthe tips (seperate problem, I'm sure)

Also I am still feeding Fox Farm nutrients (big bloom and tiger bloom)on every second or third feeding. Clean water in between.

Plants were forced to flower 4 weeks ago. Bud growth is hefty and lush. Got pleanty of trichomes by my 30x magnifier.

Could you give me an opinion of my progress?

Thanx