Produce of aquaculture in closed water of pond ecosystem or cages has being get profitability. The cage culture was influenced by water quality, feed quality and quantity and stocking. Focus of aquaculture is managed the factors, up to optimum level with biology, physic and chemical factors and knowledge about natural of regulator, the farmer while has being create unnatural ecosystem with managing water quality, supply of feed and structure of stocking density. The continuation of this article at naksara.