1954 first successful kidney transplant
If you are referring to Air pumped from an "aerator' Then the answer is "none". A filter is needed not an air pump.
No, they shouldn't. This is of course you are doing it properly. I have heard a story of someone actually blowing into the water with a straw thinking they are putting oxygen into to water. This is just going to stress the fish which could kill it.
If you are on a septic system, then it is plugged and needs to be pumped out and properly maintained.
someone who isn't stupid
until the hand gets tired
pumped bacon is pumped bacon
Sewer line is clogged or collapsed. With a septic tank, it may need to be pumped out.
it is pumped to the heart first then to the lungs
Flooding, lower mining levels needed to be pumped out.
blood is pumped through lungs
Sodium ions and potassium ions are pumped in opposite directions. Sodium ions are pumped out of the cell and potassium ions are pumped into the cell.
Helium gas is pumped into a balloon.