Photo 1 of 5-in-1 Digital Water Quality Tester: pH Meter, TDS, EC, Salinity & Temp – Essential Tool for Pool, Spa, Hydroponics & Drinking Water

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Photo 1 of 5-in-1 Digital Water Quality Tester: pH Meter, TDS, EC, Salinity & Temp – Essential Tool for Pool, Spa, Hydroponics & Drinking WaterPhoto 2 of 5-in-1 Digital Water Quality Tester: pH Meter, TDS, EC, Salinity & Temp – Essential Tool for Pool, Spa, Hydroponics & Drinking Water