Large pocket of vacuum around carbon skimmer

There is a large pocket of vacuum surrounding my carbon skimmer. It was built entirely submerged in carbon dioxide, and seems to be sucking in the gas as quickly as possible, but this is not enough to run it at 100% capacity. It makes it look like carbon dioxide is extremely viscous as it can't fill this huge vacuum bubble as fast as the skimmer can create it (at 300g/s).

The Regrettable Utopia.sav