The plants are cannibalizing themselves as they get to the last phase of Flower. The smaller leaves are all drying up off the stems and falling off. the larger fan leaves are changing color as the nutrients are drained away.
Both plants are starting to get orange and red-brown hairs. and the trichomes are goin from clear to cloudy. Just a few more weeks and they'll be ready to pull.
I will do 1 more round of fertilizer before switching to plain water for the rest of the 2-3 weeks left.
Both tents have had plenty of air flow with 1 oscillating fan and 1 lower stationary one aimed into the center of the plant.
neither are showing any issues of mold or white powdery mildew. And both plants are strong and healthy. As the leaves wither, i simply clean up after it.