Wastewater from electroplating industry was containing with high concentrations of heavy metals where when discharged into the environment will be very dangerous. Phytotechnology system is attractive and promising process system using plants. In this experiment, Kayu Apu (Pistia stratiotes L) was used in closed batch reactor system to minimize evaporation from the reactor surface directly. This study was aims to analyze removal ability of the heavy metals (nickel and chrome) and COD from electroplating wastewater by Kayu Apu with different number of individual plants and residence times. The results of the study during 15 days reactors operation and with 2,4, 6 individuals plant showed a slightly fluctuates both on the level of the Cr removal. While the increased levels of Ni removal only occur up to six days, where after 6th days tends to stable condition. COD removal also slightly fluctuating but tends to increase by reactors operated. The results of correlation test showed that the increase in the number of plants and the longer residence time will enhance the ability level of the removal by Kayu Apu. The level of heavy metal removal efficiency of Cr on 15th day is in the range 54% to 95%, Ni 64% to 80%, and COD by 3% to 50% At the end of reactor operation occurs plant mass was increased 1.13 gr/day or 0.076 gr /plant/day approximately. These results suggest that plants are capable of removing heavy metal chromium (Cr) and nickel (Ni) with high efficiency but are less able to remove COD in the wastewater from the electroplating industry. Keywords: phytotechnology, kayu apu, electroplating wastewater, heavy metal, batch system