PH Meter + 3-in-1 TDS/EC/Temperature Tester Pen Combo Digital Water Testing Kits

It's not only ideal for household or laboratory use. Also suitable for testing pH balance of drinking water, pool, aquarium, food Project, RO system, Spa, or hydroponics. Water Hardness Digital Tester.

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Water pH Meter and TDS Meter, LAWNFUL pH and 3 in 1 TDS&EC Water

It's not only ideal for household or laboratory use. Also suitable for testing pH balance of drinking water, pool, aquarium, food Project, RO system,

PH Meter + 3-in-1 TDS/EC/Temperature Tester Pen Combo Digital Water Testing Kits