A new method called Constructed Submerged Plant Bed (CSPB) uses aquatic plants to clean up polluted water. The plants absorb nutrients and heavy metals, remove dirt and organic matter, release oxygen, and control algae and bacteria growth. This technique can adjust the depth of plants underwater, making it easier to clean deep and murky water. CSPB is also easy to manage and can be customized with different plant species. This approach offers a promising way to improve water quality in severely polluted bodies of water with low visibility and great depth.