An aeration pool or tank has a bottom piping assembly with an inlet at the bottom thereof and an outlet remote from the tank a distance vertically below the inlet, and an air inlet piping assembly having an inlet above the water surface and an outlet within the tank adjacent to the inlet of the bottom piping assembly. Water under pressure flows from the tank by gravity through the bottom piping assembly and draws air through the air inlet piping assembly, mixing it with the exiting water and the aerated water flows into a second body of water across a paddlewheel to disburse the aerated water into the second body of water and create circulation to absorb additional oxygen at the surface of the second body of water. A water circulation piping assembly in the tank creates turbulence and circulation within in the water in the tank.