How to Use:
1. Fill up the glass tube with sample up to 5 ml.
2. Add five drops of Reagent 1 and swirl.
3. Add five drops of Reagent 2 and swirl.
4. If the water sample turns to blue the sample is considered soft.
5. If the water sample turns wine red; add Reagent 3 drop by drop with continuous shaking until the sample turns blue. Make sure to count the number of drops added to the sample.
1 drop= 10 ppm or 10 parts per million