Simple, fast and accurate

Simple, fast and accurate

Tetra Test GH 723 542 (total hardness), water test for freshwater aquariums, reliably and accurately measures the total hardness, 10 ml (Misc.)
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Customer Review

I ordered the product, to determine the degree of water hardness for the detergent dosage. For this, a small amount of liquid is poured into a test tube and then the test fluid dropwise while added until the color changes from red to green. This corresponds to 1 drop = 1 degree of German hardness.

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