Magnor Reagent No. 4 (Chlorine Neutraliser) is used during pool and spa water testing to improve the accuracy of your results. It works by removing the influence of chlorine in a small water sample, which can otherwise distort readings when checking pH or alkalinity levels. This helps ensure the test results reflect the true condition of the water.

This reagent is used as part of the testing process only and is not designed to treat or adjust chlorine levels in the pool itself. By preparing the sample correctly before testing, it supports more reliable readings and better decision-making when maintaining balanced and safe water conditions.