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Re: Aquatic Plants Digest V4 #1604
> I have heard a lot about Pinpoint monitors, what about Hanna? Anyone ever
> used Hanna?
I have both the pocket pH and the pocket TDS meters, and I'd swear by them
both. The TDS meter seems unbelievably solid in it's calibration. It is,
of course, very important to clean the pH meter regularly if you want even
halfway decent and stable readings. When it's clean and calibrated, I can't
see any reason to want anything more. Of course, I'm sure someone will
correct me, if that's in error! I wouldn't do analytical chemistry with it
(which I do periodically using better pH meters), but for our purposes I'd
give it the thumbs up.