Hydro-Logic 22045 Evolution-RO1000 RO Membrane Element Outdoor, Home, Garden, Supply, Maintenance. The Evolution Reverse Osmosis Membrane Element 22045 is the replacement RO Membrane for the. Membrane 22045 has a packaged shelf life. It is best to order when you're ready to install them. The EvolutionRO1000 System requires two of these membranes to operate should be replaced every 6.