RE: Water Chemistry

["gooch" <gooch@tznet.com>]

If I get this right then if I measure 250ppm then the water in us would be
(.75) 333 us??

Thanks
Phil


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www.goochs.com <http://www.goochs.com>
 


> -----Original Message-----
> From: owner-apisto@admin.listbox.com
> [mailto:owner-apisto@admin.listbox.com]On Behalf Of David A. Youngker
> Sent: Monday, November 27, 2000 5:04 PM
> To: Apistogramma Mailing List
> Subject: Re: Water Chemistry
>
>
> From: "gooch"
> Sent: Monday, November 27, 2000 8:45 AM
>
> > Is there a conversion for microsiemens to PPM conductivity.
>
> 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...
>
> -Y-
>
> David A. Youngker
> nestor10@mindspring.com
>
>
>
>
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