Spa Life Secure- Prevents and Eliminates Scale FormatUse Spa Life Secure after every water change to protect against stain & scale! Prevents scale and staining. Protects the heater element. How Spa Life Secure Works: The formation of scale in swimming pools is due to the precipitation of calcium or magnesium in the water as carbonates. There are several factors that influence this including: dissolved carbon dioxide, pH, total alkalinity, amount of calcium or magnesium in the water, and or total