Investigations into the effects of volume of water flow, quality of feed and type of feeding on the production of the Aischgrund Common Carp, Cyprinus Carpio in circular concrete ponds under high stocking density rates Investigations into the effects of volume of water flow, quality of feed and type of feeding on the production of the Aischgrund Common Carp, Cyprinus Carpio in circular concrete ponds under high stocking density rates Posted in .