PROBLEM TO BE SOLVED: To provide an efficient purification agent of aquaculture water, its manufacturing method, and a purification method of the aquaculture water using the purification agent.SOLUTION: A water solution containing humic substance is mixed to mussel fossil with a capacity ratio of 8-12% and the mixed resultant is dried, and thereby a purification agent of aquaculture water is produced. The purification agent of the aquaculture water contains the humic substance of the capacity ratio of 5 ppm to 15 ppm to the mussel fossil. The purification agent of the aquaculture water is contained in the aquaculture water at a rate of 500-2000 g to a subsoil area of 1 m2 of an aquaculture pond, and thereby more efficient purification can be performed by the mussel fossil and the humic substance of an amount smaller than that in a conventional method.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】効率的な養殖用水の浄化剤、その製造方法、及び該浄化剤を用いた養殖用水の浄化方法を提供すること。【解決手段】貝化石に対して、腐植物質を含有する水溶液を8~12%の容量比で混合し、混合された結果物を乾燥することで養殖用水の浄化剤を製造する。養殖用水の浄化剤は、貝化石に対して容量比5ppm~15ppmの腐植物質を含有する。養殖用水の浄化剤を、養殖池の底土面積1m2に対し500~2000gの割合で、養殖用水に含有させることで、従来方法よりも少量の貝化石及び腐植物質によって、より効率的な浄化を行うことができる。【選択図】図1
