Arctic Pure Adjust Down 3 Kg

This product is used to lower the pH of hot tub water. It is granular (dry) acid. So if you test the water and the pH is high add some of this to lower it. Keeping the pH of the water in the recommended range will help make the sanitizer work normally and help keep the water clear. The pH and the sanitizer (usually chlorine) are the most important water chemistry factors to monitor and keep in the recommended range.