(approx. $3,500–$4,500) use platinum-coated titanium plates to create water with a negative , which indicates antioxidant potential.

These are passive systems that raise pH by passing water through mineral media like calcium and magnesium. They are often integrated into Reverse Osmosis (RO) systems, such as those from Express Water or iSpring, which typically cost between $200 and $400 . Key Factors for Buyers

Most machines require filter replacements every 6 to 12 months , costing between $50 and $150 annually. Premium ionizers also need periodic "deep cleaning" to prevent mineral scale on the plates. Health Considerations and Summary A Guide On How To Buy An Alkaline Water Machine