XL Vanishing Act Calcium Remover for Hot Tubs and Spas
The Freshwater™ XL Vanishing Act bag removes excess calcium hardness from the water. In salt systems, the calcium hardness must be between 25-75ppm. 

Use every time you change your hot tub water.  For use with any water care system, including ACE and Freshwater Salt!

Did You Know? Use the XL Vanishing Act bag when the calcium hardness level in your fill water is 150ppm or higher.