Click to expand Tap to zoom Hydro-Logic Evolution-RO1000 RO Membrane 22045 by HydroLogic Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $193.95 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. Standard membrane included with system. Two are needed for Evolution system.