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 Lentillifera J. Agardh , The results of the study showed that