This study is an experimental research. The purpose is to study the effectiveness of Caulerpa Lentillifera for treatment of nitrogen and phosphorus in the effluent from shrimp farms. This experiment was under natural conditions. The study was divided into two sets, using the microcrosim. Set 1 control unit (Non Caulerpa Lentillifera), Set 2 performance the weight difference sample 5 L/ 7 g., 14 g., 20 g. Caulerpa Lentillifera of the retention period of 15 days.
The result show that Nitrate-Nitrogen and Total Phosphorus. Caulerpa Lentillifera weights 7 grams treatment efficiency is low. but weighs 20 grams algae treatment efficiency as high as possible.