In general, the PH meter is good, tested on tap water, bottled water and water after watering plants. I took it just for the last one. The indicators are different everywhere, but they are not very similar to real ones, or the water is very bad))) As indicated on the instructions, the initial calibration was not performed, but this may be the problem. But the plus is that there are rasters for calibration in the kit and, if desired, it can be done before use.
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