Magnor Reagent No. 3 (Acid Demand/Total Alkalinity) is used in pool and spa testing to help maintain stable and balanced water. It supports the measurement of alkalinity, which plays a key role in keeping pH levels steady. By maintaining this balance, it helps prevent sudden fluctuations that can lead to discomfort for swimmers and potential damage to pool surfaces and equipment.

This reagent is also used to determine how much adjustment is needed when pH levels rise too high. It provides a clear guide for bringing water back into the ideal range, helping you keep conditions safe, consistent, and easy to manage as part of regular water testing.