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Re: ram fry, sigh-Now: TDS -Conductivity
Wonderfull addition Max thanks. I think that will be
usefull to many of us.
Dave
--- Max Gallade <mgallade@hotmail.com> wrote:
> Dave ,
> I like to ad a quote that I kept on my files from a
> earlier Apistogramma
> list posting,It's about the conversion from
> Conductivity to TDS,Sorry for
> not remembering the author :
> Conductivity is a measure of the water's current
> carrying ability, while TDS
> is determined through a gravimetric test. The
> conversion is an empirical
> one, and varies from about 0.6 - 0.9 x µS to obtain
> ppm TDS. The value
> shifts with the types of ions involved and the
> temperature of the solution.
>
> Check with your local water supplier. If you are on
> their lines, they can
> give you the local conversion value easily enough,
> and most likely will know
> something about the aquifer if you aren't. This
> value should remain
> relatively intact if you have to soften your water
> and do so with RO or
> distilled. It probably won't if you use something
> like peat filtering, and
> certainly won't if you're hardening the water.
> Most of the time, in non- critical calculations
> (_extremely rare_, if
> existent, that the determination is critical for our
> purposes), just shoot
> for center mass and use the median 0.75...end of
> quote
> These links were pulled of a Discus forum and are
> very helpfull to:
>
http://www.corrosion-doctors.org/NaturalWaters/Lang-TDS.htm
> www.filterswater.com/convtds.html
> HTH
>
> Max
>
>
>
> ----Original Message Follows----
> From: David Sanchez <barbax2@yahoo.com>
> Reply-To: apisto@listbox.com
> To: apisto@listbox.com
> Subject: Re: ram fry, sigh
> Date: Thu, 24 Jan 2002 12:15:15 -0800 (PST)
>
> TDS meter and Counductivity meter are the same thing
> just measuring the same thing on a diffrent scale.
> ie
> ppm or DH 30 ppm is 1 DH diffrent scale same thing.
> So
> if you have a tds meter you still look for the
> diffrence in your reading from the first reading. ie
> your tank TDS is say 50 next day its 100 this change
> in 50 TDS is your level of pollution that has
> accumulated since your last reading. So keep your
> TDS
> meter you wont need to buy a Counductivity meter.
> They
> both will do the same thing. Hope this helps.
>
> Dave
>
>
> --- "R.B. Jones" <jonescamp@mac.com> wrote:
> > > To me the greatest
> > >value in conductivity meter is not in telling me
> > how
> > >hard my water is but rather in telling me the
> water
> > >quality that I am maintaining for my fish.
> >
> > a series of articles on conductivity in an old
> batch
> > of TFH mags
> > convinced me that i should replace my strips and
> > color changing
> > liquid color comparison tests with some decent
> > electronic meters
> >
> > my budget allowed for a pH meter and a TDS meter
> >
> > well, i never found the last of the articles in
> that
> > series, but
> > remember that their author spoke of TDS and
> > conductivity almost (not
> > explicitly) interchangeably
> >
> > i'm sure there are clear distinctions, but my
> > question is this:
> >
> > is a true conductivity meter going to tell me
> enough
> > new data (beyond
> > my TDS readings) that it might warrant another $$
> > investment?
> >
> > i guess what i'd be looking for is something like
> a
> > FAQ on how to get
> > the most out of a conductivity meter.
> >
> > anyone?
> >
> > Bueller?
> >
> > -R.B. Jones
> > Phoenix, AZ
> > apisto/pond/reef
> >
> >
> >
>
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