Replacement Salt-Free Water Softener Tank for Aquasana Whole House Water Filter Systems. Use genuine Aquasana replacements only - untested replacements are not certified for continued performance capacity. Replace tank every 6 years. Our dual tank system is designed to hook up seamlessly with your whole house water filter system or as a standalone softening/descaling system. Aquasana is better than just a softener. It won't demineralize your water by chemically removing minerals from the water nor will it put excess salt waste or chemicals into the water or our environment. More than just a softener, this effective softening substitute tackles typical hard water problems using proven salt-free SCM technology designed to prevent scale formation and protect from corrosion. SCM technology alters the structure of the hard minerals into a crystal structure that prevents the minerals from binding and forming scale buildup. The Aquasana Whole House Salt-Free Softener & Descaler is designed to fit seamlessly with our Aquasana Rhino Whole House Water Filter System or as a standalone salt-free softener to provide your home with scale protection for up to 6 years.