Interesting read. I am wanting to try to rejuvenate my field, I was thinking about aerating it at the tank and then have seen problems online like listed above.
Now I am considering actually aerating my field. I've got a clean out between my tank and field (after the filter in the tank of course) and I could drop a hose down there with an blubber. It shouldn't cause any disturbances in the tank, jut hopefully allow for the breakdown of the sludge in my field.