So lots of oxygen in the water is a goooooooood thing, as Martha would
say.

Yes.

In my current pond construction, I'm putting bubblers in the bog
filter's cleanout tube (which is otherwise sealed). I'm aerating the
bog. I have no bubblers in the main pond otherwise planned.

This is partly to keep a die off from happening in the even the
pump is shut down, partly to accelerate the aerobes.

C//