Water hyacinth (Eichornia crassipes) and water lettuce (Limnocharis flava) are well known aquatic weeds, which reported as able to absorpt heavy metals due to their cells structure contains fine fillys as the bio filter in sewage that contain heavy metals. To study the absorption capacity, a test has been conducted in the lab. The plants have been planted in the pails placed in a big pond. Afte…