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Re: TDS meter: which one ?
I like my TDS meter, which is the Hanna promotional offer of last year, no
longer available. While I liked the price, I would buy this one at a higher
price If that was all that was available. Its only drawback is that it has a
maximum reading of 999 ppm. A solution that is higher in TDS than that yields
an error symbol "e" which is too small for my ancient eyes to notice unless I
am specifically looking for it. The instrument is easy to use, stable and
very useful for checking to be sure there is not a drastic/deadly difference
between waters. It does not measure hardness. A solution of sodium chloride
in RO water or DI water will have zero hardness but could easily have over
1000 ppm TDS. It is not a meter which will replace pH, hardness or other
measurements, but when working with rain water species like Maratecoara,
Apistogramma, tetras, etc., it is very useful.
Lee Harper
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