Hardness TH test kit (single bottle) 1-60 °F / 1 drop = 1°F - 20

Hardness TH test kit (2 bottles) 2-60°F / 1 drop = 2°F - 40 tests

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Hach® TNTplus™ Vial Test System for Photometric Water Analysis

Calaméo - Catalog Test Rapidos Macherey Nagel

Water quality trade-offs for risk management interventions in a green building - Environmental Science: Water Research & Technology (RSC Publishing) DOI:10.1039/D3EW00650F

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Water hardness is a quantitative measure of the total content of Calcium and Magnesium ions present in a water sample. The CHIM-1-TEST is a water