NUBE 30L/day replacement filters Contains 1 RO Membrane 50 GPD Life span up to 24 months Easy installation (3 minutes): Just unplug the old one and plug the new one. Your NUBE 30 needs to be changed RO membrane every 24 to 36 months, depending on the use you give it. It's easy to notice when you have to change it: If the smell or taste starts to feel like stagnant or if the water flow is blocked.