I like this a lot because it's EC and with aeroponics you have to keep a close eye on EC and PH. It's rechargeable (I didn't know about it when I bought it) and has a backlight when needed. I had no problems, easy to calibrate and does not drift. Can't say enough good things, if you need EC and PH this is what you need. I would recommend a device with a few euros more temperature, but nice to have.
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