AQUADUR test strips gradation: 3-21 °dH, 5000pcs

Item No.9130396
Water hardness test strips, AQUADUR® For determining water hardness. Colour change from green to red. Scale grading: 4 / >7 / >14/ >21 °d* Package contents: Bag of 5000 strips *single sealed Pack: 5000 each/pack
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