The proper level of alkalinity in pool water helps maintain a stable pH. Acid or alkaline influences from sources such as rainfall, make-up water, and choice of sanitizer will shift the pH if total alkalinity is out of range. Critical to alkalinity control, this product effectively raises alkalinity which might otherwise cause equipment corrosion. This product is a special compound used to increase the total alkalinity in the pool and or spa water.
Note: Product sent has the same chemical make-up, but may not look exactly like the item pictured above.