Is it normal for the individually wrapped Total Hardness Test Strips, 0-425 mg/L, to be green when they are first opened?

Document ID

Document ID TE7096

Version

Version 5.0

Status

Status Published

Published Date

Published Date 09/20/2018
Question
Is it normal for the individually wrapped Total Hardness Test Strips, 0-425 mg/L, to be green when they are first opened?
Summary
Green hardness test strips
Answer
It is normal for the individually wrapped Total Hardness Test Strips (Product # 2793844 and 2793828) to be green when they are first opened. This is because the color change is due to a displacement reaction. For more information regarding how these test strips work, please see the article linked below:

How do the hardness test strips work?

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