Pond bottom aeration aerator at pool's bottom transmits stainless blast pipe, by patented connection conical blades, to squeeze air into the aeration pipe and produce small bubbles, which are highly oxygen dissolved.The transmission of the patented circumferential aerator plate drives air and water flow to stir the harmful substances at the bottom of pool. Then, with the pool's continuous flow, they to the sewage draining exit to keep the bottom clean.