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GARGAS: Water and the Aquarium                Page 9

           Tank  Water Wal-Mart Fayetteville, Arkansas



        Conductivity:  1760 μS  x .64 = 1126.40 mgl/ ppm (TDS)
        TDS:     (1760) x (.64) = 1125.40    mg/l or ppm
        Osmotic pressure:                                               lbs per square inch
        Total Hardness 100 mg/l ppm
        Calcium 80  ppm (as CAC0  Calcium Carbonate) x .4 to get calcium ion = 32 ppm
                             3
        Magnesium 20 ppm  (as CAC0  Calcium Carbonate) x .24 to get magnesium ion = 4.8 ppm
                              3
        Alkalinity 40 ppm (as CAC0  Calcium Carbonate) x .61 to get Bicarbonate ion  = 24.40 ppm
                            3
        Chloride 424 ppm  as Chloride = 424 ppm
        Sulfate    4 ppm  as Sulfate = 10 ppm
        Nitrate No3  10 ppm   = 10 ppm
                Sodium Na+ can only be measure with major equipment such as atomic adsorption
        or Mass Spectrometer however we can get an educated guess by multiplying the chloride
        ion Cl  X .65 to get an guesstimate of the Sodium so in this case the amount of Sodium
             -
        would be:
        Chloride:  424 x .65  = Sodium                  Sodium = 275.60 ppm


















               780.8  ppm
                We just dissected the aquarium water now add up all the results that are underlined
        and see how close we get to the TDS . The Total comes to 780.80 ppm
        The approximate TDS is          1126.40
        After adding the ions we got    - 780.80   subtracting these two numbers like above:
        Unknown Difference                  345.60

                The difference maybe other minerals besides Sodium that have been added
        to the water by someone!!

        Not only have there been additives added to this water but there is no longer an ionic
        balance which is just as important in the osmoregulation of fish besides the Osmotic
        Pressure.
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