Granules adjust water pH and alkalinity down. Best for larger and commercial spas.  

• Lowers pH and total alkalinity
• Increases effectiveness of sanitizer

Tips:
Dissolve first by adding to a small, plastic pail of water. Then, apply the solution to hot tub water.
Maintain the pH between 7.2-7.8. High pH (above 7.8) can cause scaling and/or cloudy or colored water.

Compatible with:
Chlorine, bromine and biguanide sanitizers.