Review on WEKSUN pH and TDS Meter Kit - Digital Water Quality Tester for High Accuracy Testing of pH and TDS Levels - Backlit Screen - Ideal for Drinking Water, Aquariums, and Swimming Pools by Lindsay Erdman
Not calibrated! for pH meter
Do I need to calibrate before first use? It looks like this because it doesn't work. If so then I don't have the powder so I guess I'll have to buy it.
- Nice item
- Appearance
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