ALGICIDE

摘要

PROBLEM TO BE SOLVED: To obtain a new algicide which overcomes a problem that increase of elution of Zn ion in water with time exceeds a proper level and reaches a level to adversely affect aquatic lives when an algicide of a hydrotalcite and an algicide of fired substance of the hydrotalcite are used for many days, being defects of the algicides. SOLUTION: This algicide comprises (A) a Zn-based hydrotalcite and/or the oxide solid solution of fired Zn-based hydrotalcite and (B) synthetic aluminum silicate as active ingredients.