The objective of this experiment were studying the nutrients consumption, appropriate light intensity and the culture system of Caulerpa Lentillifera J. Agardh. Trial 1 Study the rate of potassium nitrate 0.004 g/L and potassium dihydrogen phosphate 0.0003 g/L (nitrogen: Phosphorus 8:1) against the growth of Caulerpa Lentillifera J. Agardh , The results of the study showed that the algae of grapes had a range of adjustment during the 1-2 date period and began to have increased growth rate in the 3rd day and maximum growth on the 6th day weight 26.87 ± 0.96 g after that, the weight is reduced, which corresponds to the amount of the nitrate analyzed. The concentration is reduced gradually from the initial concentration of 19.10 mg/L.