The present invention relates to a method of treating microorganisms in an aquaculture pond water, which mixes a starting composition consisting of phosphoric acid solution, sodium chlorite solution and water, so as to produce a bacteriostat. The bacteriostat is immediately added into the aquaculture pond water, thereby safely inhibiting the growth of Vibrio sp. in the aquaculture pond water.一種處理養殖池水體中之微生物的方法,其係在處理養殖池水體前,將由磷酸水溶液、亞氯酸鈉水溶液及水所組成之起始組成物進行反應後,製得含二氧化氯的抑菌試劑,隨即投放於養殖池水體,藉此安全地抑制養殖池水體中弧菌屬的生長。