The main objective of this experiment was to determine the optimal density or stocking rate for the optimal total production and growth rate of common carp, Cyprinus carpio . A raft of 10 x 10 m made of steel bars with drums as floaters was divided into nine plots. A cage of polyethylene 3 x 3 x 2 m, 1 inch mesh size was hung in every plot. About three fourths of the cage was under water. Three stages of stocking rate of common carp of about 130 g individual weight were used: 2 kg/m², 4 kg/m² and 6 kg/m². The experimental Latin Square design was used. Artificial fish food (pellet) containing about 32 percent crude protein was given five times a day. Fish were fed to satiation. Morphometrical and limnological data were measured every 14 days. Individual growth and actual rations were calculated daily. As a result of this experiment, common carp culture is floating net cages with a stocking rate of 6 kg/m² is recommended.