Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter and PH Tester for Pool Saltwater and Drinking Water, 5 in 1 Salinity PH Temp EC and TDS Meter Swimming Pool Hot Tub Spas, High Accuracy JBOX 5mm stroke length B084V75MQR 5mm stroke length Apply base gel and cure it with a UV LED lamp 30s This is not only been convenient for your different water testing needs Seawater Test: 10 200ppt (1ppt=1000ppm
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