How to purify a pond

Abstract

To provide a pond purification method for, in a pond (for example, a pond around an artificial mountain in a monkey enclosure at a zoo) provided in a region where, animals for appreciation (for example, monkeys) in a zoo are cultured, preventing or reducing, deterioration (for example, great increase of a degree of becoming muddy of pond water) of landscape properties which may be caused by, excreta discharged by the animals for appreciation or leftovers of bait.SOLUTION: There is provided a pond purification method for, in a pond provided in a region where, animals for appreciation are cultured, a water flow in a horizontal direction and being circulated, is formed, and grain bodies for water quality purification formed of calcium silicate-containing materials, are supplied in a water quality purification grain body supplying step.SELECTED DRAWING: None