When the whirling axis is at 1-meter deep in water, its operation creates interactive circulation among the upper and lower currents, and the oxygen dissolution efficiency achieves 360 degrees with no dead space. The α left-whirl axis spurts the water of the bottom layer out of water-surface in a very short time to dissipate the heat at the floor fish farm in summer. The diameter of water-surface elevation is as wide as 9.5 meters at a height of 1.5 meters. In addition to attaining the purpose of surface-bottom circulation, UV rays in the sunlight eliminate disease germs in water, bottom-growing diatoms are spurted out of water surface to stabilize water algae, and the bottom layer temperature is lowered in a boiling hot summer. In this way, the fermentation of toxic gases caused by high temperatures, such as ammonia nitrogen, can be avoided, the survival rate of aquacultural animals is thus raised, and the number of catches increased. This product poses a strong contrast to traditional paddlewheel aerators that only agitate water 10cm under the surface of the water and provides a very limited dissolved oxygen content.