The Original Sujata Alkaline is for acidic water conditions. The Sujata Alkalizer elevates pH in acidic water to help control corrosion (protecting equipment) and improve taste. The Sujata Alkalizer is used on water with pH between 5.6-6.5 this elevates the pH to 10-10.5. The Sujata Alkaline''s replacement is simple, quick and clean. Internal filter parts are never exposed to handling or contamination.