The present invention relates to a water treatment apparatus for an aquaculture tank, and more specifically, to a water treatment apparatus for an aquaculture tank, in which treatments such as the removal of solid materials by means of centrifugal force generated by rotating sea water that flows into a reaction tank, maximization of the effects of sanitization through uniform mixing of ozone and air, and the removal and agglomeration of soluble organic materials contained in the water, and deaeration of carbon dioxide are performed at the same time. The water treatment apparatus comprises: an inlet pipe supplying sea water a gas supply unit connected to one end of the inlet pipe to supply ozone and air a cylindrical reaction tank connecting the inlet pipe to a lower part to supply the sea water mixed with the ozone and the air to the inside, and connecting the inlet pipe at a tangential direction to make the sea water form a spiral flow in the inside as the sea water is discharged in the tangential direction of an inner side surface a partition wall tilted upwards and extended towards a central part in the lower inner surface of the reaction tank to form a cone shape having a cross section which gets smaller from the lower part to the upper part, and partitioning an inner space of the reaction tank into a first reaction space placed in the lower part and a second reaction space placed in the upper part a guide pipe vertically extended towards the second reaction space in the central part of the partition wall to enable communication between the first and second reaction spaces and a discharge pipe connected to the second reaction space to discharge treated water purified in the second reaction space to the outside.COPYRIGHT KIPO 2016본 발명은 양식수조용 수처리 장치에 관한 것으로서, 보다 상세하게는 반응조로 유입되는 해수를 선회시켜 원심력에 의한 고형물질 제거와, 오존 및 공기와의 균일한 혼합을 통한 살균, 수중의 용존성 유기물 제거 및 응집효과의 극대화, 이산화탄소 탈기 등과 같은 처리가 동시에 진행되도록 하는 양식수조용 수처리 장치에 관한 것이다.이러한 본 발명에 따른 양식수조용 수처리 장치는 해수가 유입되는 유입관 상기 유입관의 일단에 연결되어
