Total test time: 3 seconds, number of tests: pack of 10 With their low cost and high accuracy, Simplex Health total hardness test strips also offer you time-savings 10 test strips per pack, excellent value for money Sensitivity: 0, 40, 80, 120, 180, 250, 425, 1000 PPM (MG/L) or 0, 2, 5, 7, 11, 15, 25, 58 GPG
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