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2-in-1 Chlorine & PH Meter Swimming Pool Tester, CL2 Level Meter Test Spa Water Quality Analysis Monitoring Monitor Analyzer, Handheld Portable
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Hand of a service worker is holding water testing kit to check PH and chlorine concentration in swimming pool. Stock Photo | Adobe Stock
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Analysis of the PH and chlorine of the water in a swimming pool in Summer. Measurement of chlorine and PH of a pool BANNER. Cleaner Kit. Spain, 2019 Stock Photo - Alamy
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