PURPOSE: To keep the water-quality of a fish breeding pond or pisciculture pond and improve the growth of fries by easily and speedily removing feeds, feces, stains, etc., sedimented or floating in a fish-breeding pond, etc., without staining the hand and necessitating labor.

CONSTITUTION: The objective pisciculture system is provided with a pollutant- removing apparatus to remove chlorine, ammonia, acid, alkali, metal, etc., from river water, a fry-breeding bed and pisciculture pond supplied with water obtained by removing pollutant from river water with the pollutant-removing apparatus, a breeding pond to breed the fries grown in the fry-breeding bed and pisciculture pond and a feed and feces-treating apparatus placed near the breeding pond.