Safe Tap Check™ 9-Way Water Test Kit makes testing accurate, affordable, and easy. A very simple and effective way to test the standard of your dr...
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Best Selling Global Product! Detects; Total Hardness: 0, 25, 50, 120, 250, 425 ppm (mg/L) Total Chlorine: 0, 0.5, 1, 2, 4, 10 ppm (mg/L) Free Chlor...
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2 tests each per 30 students Detects: Free Chlorine: 0.0, 0.1, 0.2, 0.5, 1.0, 2.5, 5.0 ppm (mg/L) Total Chlorine: 0.0, 0.1, 0.2, 0.5, 1.0, 2.5, ...
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