AQUADUR test strips gradation: 4-21 °dH, 1000 pcs

Item No.9130398
Water hardness test strips, AQUADUR® For determining water hardness. Colour change from green to red. Scale grading: <3/ >4 />7 / >14/ >21 °d* Package contents: Bag of 1000 strips* *single sealed Pack: 1000 each/pack
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