The sample turns blue instead of pink after adding the Hardness Indicator Reagent (Univer®3, ManVer®, or CalVer®). What does this mean?

Document ID

Document ID TE290

Published Date

Published Date 27/05/2017
Question
The sample turns blue instead of pink after adding the Hardness Indicator Reagent (Univer®3, ManVer®, or CalVer®). What does this mean?
Summary
Sample turns blue after adding UniVer®3, ManVer®, or CalVer®
Answer
If the sample turns blue instead of pink after adding the Hardness Indicator Reagent (UniVer®3, ManVer®, or CalVer®), this indicates that the sample water is very soft and its hardness is below the detection limit of the test. This is common after the water has been softened.