PROBLEM TO BE SOLVED: To clean and activate breeding water suitable for breeding a lot of fish and shellfish such as shrimps, sea slugs, or sea breams.SOLUTION: A cleaning activator for fish and shellfish breeding water is obtained by mixing or impregnating humus acid in silicate mineral powder or baked silicate mineral powder. The silicate mineral powder is preferably a mixed powder of 4-20 mass% of inosilicate mineral, 16-40 mass% of phyllosilicate mineral, and a remaining portion of other silicate minerals.COPYRIGHT: (C)2013,JPO&INPIT【課題】エビ、ナマコ、タイ等の多くの魚介類の養殖に適した飼育水の浄化及び活性化、さらには優れた養殖方法の提供を目的とする。【解決手段】ケイ酸塩鉱物の粉末又は当該粉末の焼成体に、腐植酸を混合又は含浸させたことを特徴とする。【選択図】 なし