Greywater treatment is easy to found in developing country. In this study, the treatment is something that can give efficiency and benefits. This research was doing to know the reduce of Nitrogen ammonium and Total Phospor from Greywater. Also view the treatment water if used for aquacultur activity. The treatment will be doing is Aquaponic system. This Aquaponic system is got inspired by treatment with Constructed wetland. In Constructed wetland system reduction is doing by plant and also helped by growing media. Aquaponic itself is an alternative technology of agriculture, there is have part of Aquaculture combined with Hidroponic. The plants that used in this study is Genjer (Limnocharis flava), this plant is already know as plant food, also known as pests in agricultural fields. In other study was found that the plant is able to reduce metal contain in water. The result shows, that Genjer can reduce N ammonium as much as 90% and 62% for Total P in Greywater. Treated Greywater than get put the fish (Oreochromis niloticus) into it. The result shown that fish can survive in the treated water and just some fish got fungus on their fins. 
Key Words: Aquaponic, Greywater, Limnocharis flava, Nitrogen ammonium, Phospor Total.