Pool balancers adjust water parameters such as pH, Alkalinity, Hardness, and Stabilizer to protect pool surfaces and equipment, as well as maintain swimmer comfort. It is recommended to test pool water weekly and make any adjustments to parameters that require them. This Bundle includes pH down to lower pH to a more neutral range of 7.2-7.6. The pH levels in saltwater pools tend to drift upwards due to the way chlorine is generated from sodium chloride. A neutral pH is necessary to allow chlorine to reach its best potential as a sanitizer or oxidizer. Keeping the pH 7.2-7.6 will also better protect a pool's surfaces and equipment from scale buildup. Scale, Metal & Stain Control removes fresh metal stains, including iron and copper, and protects equipment from stains and scale. Salt Pool Test Strips are used to test salt levels (ppm) and test balancer and salt-generated levels.