Photo 1 of YINMIK pH Salt Meter 5 in 1 pH TDS EC Salinity Tester for Pool Spa Aquarium Hydroponic Saltwater Digital pH and PPM Tester for Household Drinking Water Hot Tub Home Brewing Fish Tank…

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Photo 1 of YINMIK pH Salt Meter 5 in 1 pH TDS EC Salinity Tester for Pool Spa Aquarium Hydroponic Saltwater Digital pH and PPM Tester for Household Drinking Water Hot Tub Home Brewing Fish Tank…Photo 2 of YINMIK pH Salt Meter 5 in 1 pH TDS EC Salinity Tester for Pool Spa Aquarium Hydroponic Saltwater Digital pH and PPM Tester for Household Drinking Water Hot Tub Home Brewing Fish Tank…