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Rinse the measuring vessel with the water test sample and fill the water sample up to 5ml mark.
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Add 4 drops of REAGENT 1 and mix.
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Add 1 spoon of REAGENT 2 and mix. The water sample will turn pink.
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Immediately after finishing Step 3, add Reagent 5 drop by drop and mix well after each drop until the water colour changes from pink to blue. Count the number of drop, and label as A.
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Rinse the measuring vessel with water test sample and fill the water sample up to 2.5ml mark.
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Add 2 drops of Reagent 3 and mix.
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Add 1 drop of Reagent 4 and mix. The water sample turn purple.
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Add Reagent 5 drop by drop and mix well after each drop until the water colour changes from purple to blue. Count the number of drop, and label as B.
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Read the values of calcium and magnesium from the table..