|Encrustation and element content of different charophytes, growing in freshwater, marine-brackish water, and inland brackish water sites were studied. Seasonal patterns of charophyte encrustation were found to be species-specific. Encrustation of charophytes from freshwater were higher than from brackish water. The composition of the carbonate crust was shifted; Na content changed according to Na+ concentration of the habitat water. Charophytes co-precipitated Cd, Cu and Zn in the carbonate crust, thus they can be used for bioremediation in Na+ depleted water.