How do I test? again.
Totally submerge the testing strip in the water for one second. Shake off water droplets. NO3/KH/pH-value: After
one minute compare the colour areas with the scale on the container label. A transition colour indicates an interim
value. GH-value: Compare the 3 GH squares with the scale on the container label. The numbers of the violett
coloured squares show the total hardness. Partly coloured squares show an intermediate value.
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