Review on Digital Water Testing Kit - Ruolan Lab pH Meter, TDS and PPM Tester for Hydroponics and Water Analysis by Janet Williams
Pay more for what you can trust
I bought this primarily for a pH meter. That is completely dishonest. Compared to litmus drops with distilled water, it differs in several respects. After calibration, the result is the same. Unfortunately, I only found out about this after the damage had occurred.
- Done
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