FilmTec Corp., a subsidiary of Midland, Mich.-based Dow Chemical Company, announces the availability of the most productive seawater elements on the market. With a 20 percent gain in flow rates and excellent salt rejection, the Filmtec™ SW30 elements meet the current and emerging needs of the marine industry, as well as island residential systems, better than any other products available. The product range is now enhanced with additional performance value built into every element.