What is Reddit's opinion of
Tds Water Testing Meter Ideal Water Quality Tester Pen for Drinking Water, 0-9990 ppm, EC & Temperature Meter 3 in 1, Backlight PPM Meter Pen for Hydroponics Aquarium Tds Meter Digital Water Tester?
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1 review of this product found across Reddit:
1 point
·
18th Dec 2020
I wouldn't worry much about brand. Just get a reference solution, and test the EC meter against the reference solution.
Here's one similar to mine. They're cheap. https://www.amazon.com/Drinking-Reliable-Accuracy-Temperature-Hydroponics/dp/B07ZQ92JJR
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