> At 25C a 6.6 ppt salinity is 1.003. At 23C a 5.9ppt salinity is 1.003.
And
> at 19C a 6.0ppt salinity is 1.004. As you can see is it temperature
> dependent and relatively insignificant to most freshwater fish. I am
> currently treating 3 muskies in a 1% NaCl solution which corresponds to
> about 1/3 seawater or about 12 ppt salinity. Using a refractometer will
> give you the most accurate determination of "salt" in the water because is
> measures the salinity where a hydrometer is much more variable since it is
> temperature dependent. With that said, it is usually only critical in lab
> work or if you are at the maximum end of what a fw fish can take in which
> instrument you use. Event saltwater fish can take a very wide range of
> salts in the water. You might want to check out and of the books that
> Stephen Spotte has written. He has more than you ever would like to know
> about this and all other aspects of the aquarium hobby. His best work is
> his latest, Captive Seawater Fishes. As with other books, he has charts
> which can give you the info you need.
>
> Nick Zarlinga
> Aquarium Biologist
> Cleveland Metroparks Zoo
> 216-661-6500 ex 4485
>
> "Fish worship... is it wrong??" (Ray Troll)
>
>
> original message
>
> Date: Sat, 28 Apr 2001 09:38:13 -0400
> From: "Bob Bock" <bockhouse_at_earthlink.net>
> Subject: NANFA-- ppt vs. specific gravity
>
> Does anyone know how to relate parts per thousand of sodium to the
specific
> gravity of sea water? What specific gravity would water with a salinity
of
> six parts per thousand have?
>
> Thanks, all.
>
>
>
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