The Macherey-Nagel AQUADUR Test Sticks, Gradation ≤3, >4, >8.4, >14, >21 °dH, Single Sealed, Pack Of 1000 are designed for determining water hardness. These test sticks provide a colour change from green to red for practical water hardness testing applications.
These Macherey-Nagel AQUADUR test sticks are suitable for users requiring single sealed water hardness test sticks with clear colour change indication.
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