SpaPure Alkalinity Increaser is a simple, effective balancer that raises the total alkalinity of your spa water. It's pure sodium bicarbonate — the same trusted chemistry behind reliable water balance — and it goes to work immediately, with no waiting period before you soak. Total alkalinity is the unsung hero of spa water. It acts as a buffer that holds your pH steady, so the water resists the wild swings ("pH bounce") that happen when alkalinity runs low. When alkalinity drops too far, the consequences add up fast: corrosion of your spa and equipment, a sanitizer that can't do its job efficiently, and water that stings eyes and irritates skin. Get alkalinity into range and the whole system settles down — pH becomes easy to manage, your sanitizer works as intended, and the water is gentler on both your spa and your skin. Pro Tip: Balance alkalinity before pH, not after. Total alkalinity is the foundation that keeps pH stable, so trying to dial in pH while alkalinity is off is a losing battle — the pH won't hold. Set your total alkalinity into the 80–120 ppm range first, and you'll find pH falls into place and stays there. Brand SpaPure®
