This is a Pentair Rainbow 1200 Specialty Test Kit for Total Water Hardness using a drop test and visual method. Testing parameter indicates total hardness in PPM or grains. The reagents in this kit are 1/2 and 1 ounce. This kit comes in a compact box with instructions.
Calcium hardness is a necessary component in pool water because it helps prevent leaching out of certain substances in pool equipment. It works in conjunction with alkalinity and pH. You would balance alkalinity, pH, then calcium hardness in your pool, in that order. That is because adjusting alkalinity often affects pH. Adjusting both alkalinity and pH often affects your calcium hardness.
