Hydro Logic Evolution-RO Membrane (HL22045)Use the Evolution RO1000 RO Replacement membrane when your flow rate decreases or your PPM increases. The RO membrane will remove 98%+ of PPM of Total Disolved Solids. Replacement Directions: Lube the two small o rings on the stem of the membrane with silicone lubricant. Discard all water to drain for 1 hour prior to use. Two are needed for Evolution systems.
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