Wrong answer #3
The larger the surface area the greater the area for oxygen CO2 exhange, the more oxygen the better. That's why some people use airators, they don't directly induce oxygen, the increase the surface area by forming bubbles, which allows for more oxygen/CO2 exhange accross the increased surface area.
Bunker or any other bait for that matter, can't live without oxygen.
You are trying to apply fish tank dynamics to a bunker pen,
they are not the same situation, and your advise does not hold true,
or even apply when discussing a bunker pen.
Generally bunker pens do not use aeration devices.
You are confusing a pen with a livewell,
they are different.
Humans can't live without oxygen either,
lack of it causes brain damage.
I often wonder if NE members forget to breath while posting