CO2 not building up when I have an non-functioning Carbon Skimmer

I took a quick look and it doesn't appear like anything unexpected is happening. There is a moderate amount of CO2 around your base, either in small pockets inside, or off in side tunnels that have doors on them, and my guess is that enough of the CO2 has leaked outside your base that there isn't much left inside.

Huh, I am now on cycle 68 and I'm pretty sure my skimmer has still not produced any polluted water (literally my only polluted water throughout the whole game has been from wash basins and mopping random puddles in ice biomes and whatnot).  I haven't made any attempt to purify any of it and I still have almost none, whereas in other games, carbon skimmers were a pretty significant source of polluted water.

It also might not be an issue with the scrubber, it could be something else weird that is going on and deleting CO2, but as far as I can tell, CO2 barely exists in my game for whatever reason, and I am not doing anything to combat it other than the lone scrubber that basically isn't doing anything.  I'm tempted to save a separate file and try to isolate what is going on.

Edited August 28, 2018 by MagnetMD

How many dupes do you have?  I havn't had to really deal with co2 before cycle 100 keeping dupes under 6-8 and before making a petrol generator ( makes lots of co2 ).  It usually just falls to the bottom and as you dig deeper, it moves down.