Blue Devil Calcium Hardness Test Solution A B7028

Blue Devil Calcium Hardness Test Solution A B7028

  • $2.48


Calcium Hardness Test Solution A by Blue Devil B7028

Directions:

  1. Rinse vial marked Hardness?Alkalinity and fill to line A with water to be tested.
  2. Add 2 drops of Hardness Solution A and swirl to mix. A violet color will develop if Hardness is present
  3. Add Hardness solution B in drops until color changes to a permanent blue.
  4. Calculation: Multiply the number of drops by 50 to determine the Hardness in parts per million (expressed as calcium carbonate).
    Example: 7 drops X 50 = 350 ppm Hardness.
  • Ideal Hardness is 200-400 ppm. If your water tests over or under this range, consult a pool store specialist for advice.