A new generation of fouling resistant seawater reverse osmosis membranes with FilmTec™ SW30XFR-400/34. Decelerate pressure drop increase, reduce number of cIean-in-place, maintain water quality (stable salt rejection using FilmTec™ SW30XFR-400/34 & SW30XFR-400/34i despite repeated clean-in-place), and ultimately prolong membrane life.