Review on 🔵 Ultimate Accuracy VIVOSUN TDS Tester 3-in-1: TDS EC & Temperature Meter - High Precision Digital Water Quality Analysis (Blue) by Marcus Hargrave
Pre-Calibrated - Compound Analysis Instruments
When you can be confident that your $10 purchase has been properly calibrated and you're ready to throw caution to the wind throughout your grow. Yeah I mean I don't know what I was expecting for $10 honestly lol. You can't calibrate it and it's pretty common knowledge that they need to be adjusted from time to time. A good option for a cheap temporary tester, provided it is properly calibrated. My concern is how long will it stay exactly?
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