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    Product 48 of 51
    This product was added to our catalog on Saturday 22 December, 2012.

    Blue Devil Solution A Calcium Hardness Test B7028
    [B7028]

    Price:  

    Calcium Hardness Test Solution A made 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.
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