Tried a "take every dupe" run and everybody dead. Question on ventilation

I've been playing for a few years now and my typical thing is to build slow and keep about 10 or so dupes. I figured i would change it up a bit and tried a "only take dupes that fart", but after a little while that just got boring. Not the source of power I was looking for.

Then I tried a run where I take a dupe every time one is offered. I got up to cycle 185 before I decided to call it. While not everyone was dead, 75% were and that seems like a loss to me.

What killed them in the end was starvation because the farms were not getting enough oxygen,

I had really underestimated how much oxygen ~60 dupes consume and how much CO2 they produce. That was never really an issue before. Of course I also kept a pretty dense base. I had airflow tiles between floors and a central shaft that was 5 wide. But it really seems like they were consuming oxygen (and sometimes farting) enough that the other gases were not settling out fast enough.

I definitely need more electrolyzers. i tried playing with flooded open air ones this game and it took longer to get them going than the typical one I do. Also be hard to cool, but it never got that far.

So my question is if anyone has really played with air circulation? For example, pumping air in one side of the base, and using a pump on the other to push the circulation? That did not work very well for me cause of the lack of oxygen being pushed.

In another idea i was thinking about putting in a plenum space between floors with air flow tiles and pumping those out.

Another game I did pump oxy into the middle and pulled from both sides. Was okay, but not with this many dupes.

I'd just be happy to hear some ideas on promoting gas flow around the base.

Thanks!