I also disagree with the Dissolved Oxygen argument. If fish require more oxygen than cannabis how come most fish tanks only have a cheap water pump/waterfall. It is because the waterfall action provides enough oxygen for fish.
I personally run cheap air stones to keep my roots from settling to the bottom of my totes. I also run them to just avoid bullshit root rot n such since I don't run a water chiller
. Its habit for me at this point.