These plants are at 23 days of 12/12..is it too late to remove some leaves. I have passive air intake at bottom of tent and fan going but worried it might not be enuf air flow
I do a big defoliation on day 21 of flower where I remove about 1/3 of all fan leaves. You're at day 23, so I think you'll be just fine.
If you have a strong exhaust fan and passive intake from the bottom of your tent, you're probably getting plenty of air flow in there. Just try to keep humidity at 50% or below, and don't let it get up too much higher.