pH Stable is a water balancing chemical for your hot tub that will maintain a stable level of pH by ensuring the pH range does not change erratically. This will reduce the need for numerous other balancing chemicals in your hot tub. Another great feature of pH stable is its ability to soften the water. It does so by eliminating the dissolved calcium that is present, in turn making the water more clear. With this easy to use product, you will be able to maintain a proper pH while enjoying the added benefits.