SpaPure Alkalinity Increaser (1 lb) (2 Pack)Brand: SpaPure Features: Increase total alkalinity levels Stabilizes pH Acts as a water buffer or "pH buffer" to prevent "pH bounce" 2 Pack Binding: Lawn & Patio Details: The SpaPure Alkalinity Increaser is the smart formula to combat low levels of alkalinity, which if left untreated can cause corrosion damage, weaken your sanitizers ability to keep your spa clean, and cause skin and eye irritation. When alkalinity is balanced correctly, the water