Ensure accurate calcium hardness testing in your pool with this Calcium Indicator Powder, available in a convenient .25 lb container. This high-quality reagent is designed for use in various water testing kits, providing precise measurements of calcium levels to maintain balanced pool water. Proper calcium hardness helps prevent scaling and corrosion, ensuring your pool surfaces and equipment stay protected. With easy-to-follow instructions, our Calcium Indicator Powder makes testing simple and reliable.