I'm not the type to leave negative reviews but this product deserves one. I've read other reviews about buying a calibration solution to get it working. I've done all this and it never worked. I take a reading from a salt strip (good for accuracy), take a water sample to the local Leslie (fairly good), and then take a reading on the same water (horrible results, not even close to the others). Maybe I'll hear from the company how I'm doing it wrong? I'm open to suggestions and will revise my review if it ever works. In the meantime, I'll keep trying and realize I've fallen for the trick. Frustrated that I wasted so much time and money trying to get it right.
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