Hydrilla verticillata are able to absorb heavy metals in the water and it can be used for phytoremediation process. A research aims to understand the Zn, Cu and Fe content in the water and the ability of the plants to accumulate those heavy metals was conducted in March - April 2018. H. verticillata are tied to anchored rope at 3 different depths (in the surface, 0.5 m and 1 m depths). The plan…