Nick Zarlinga
Aquarium Biologist
Cleveland Metroparks Zoo
216.661.6500 ext 4485
><)> -----Original Message-----
><)> From: owner-nanfa_at_aquaria.net
><)> On Behalf
><)> Of Shane Graber
><)> Sent: Wednesday, January 21, 2004 1:55 PM
><)> To: 'nanfa_at_aquaria.net'
><)> Subject: RE: NANFA-- a lil' help from my friends....
><)>
><)>
><)> If you know how much salt you added and what the
><)> resulting salinity is in
><)> ppt, you should be able to do a simple calculation
><)> to figure it out.
><)> Salinity in ppt is nothing more than grams of salt
><)> per liter of water so if
><)> you know that you added X grams of salt to an
><)> unknown volume of water and
><)> got a resulting salinity (ppt), a simple
><)> calculation should tell you the
><)> answer.
><)>
><)>
><)> grams NaCl
><)> ---------- x 10^3 = ppt
><)> Liter
><)>
><)>
><)> 800 lbs NaCl = 362873.9 grams. Resulted in a
><)> salinity of 2.2 ppt.
><)> 600 lbs NaCl = 272155.4 grams. Resulted in a
><)> salinity of 1.2 ppt.
><)> 400 lbs NaCl = 181436.9 grams. Resulted in a
><)> salinity of 1.1 ppt.
><)> 200 lbs NaCl = 90718.47 grams. Resulted in a
><)> salinity of 0.6 ppt.
><)>
><)> The input water was 0.1 ppt so subtract 0.1 from
><)> all salinity values to
><)> adjust for the raw water (see below).
><)>
><)> Solve for liters and convert to gallons:
><)>
><)>
><)> # liters = (grams NaCl x 10^3)/ppt
><)>
><)>
><)> _at_ 800 lbs:
><)> # liters = (362873.9 grams NaCl x 10^3)/2.1 ppt =
><)> 172,754,238 L
><)> # gallons = # liters / 3.785412 gal/L = 45,636,839 gallons
><)>
><)>
><)> _at_ 600 lbs:
><)> # liters = (272155.4 grams NaCl x 10^3)/1.1 ppt =
><)> 247,414,000 L
><)> # gallons = # liters / 3.785412 gal/L = 65,359,860 gallons
><)>
><)>
><)> _at_ 400 lbs:
><)> # liters = (181436.9 grams NaCl x 10^3)/1.0 ppt =
><)> 181,436,900 L
><)> # gallons = # liters / 3.785412 gal/L = 47,930,555 gallons
><)>
><)>
><)> _at_ 200 lbs:
><)> # liters = (90718.47 grams NaCl x 10^3)/0.6 ppt =
><)> 151,197,450 L
><)> # gallons = # liters / 3.785412 gal/L = 39,942,138 gallons
><)>
><)>
><)> I believe that your salinity and conductivity
><)> reading that you took after
><)> you had added 600 lbs salt to the tank is off so
><)> omit that reading and find
><)> an average of your gallons. I base the omission
><)> on drawing a Salinity (ppt)
><)> chart vs Conductivity (ms). If that 600 lb
><)> reading is omitted the R^2
><)> result of that graph is 0.9993. With it, it's 0.9471.
><)>
><)> I'd say your display tank is about 44,500,000
><)> gallons. If I'm right (and
><)> I'm pretty sure I am), that's a friggin HUGE tank!
><)>
><)> Shane
><)>
><)>
><)>
><)>
><)> > -----Original Message-----
><)> > From: Nick Zarlinga
><)> > Sent: Wednesday, January 21, 2004 8:24 AM
><)> > To: Aquatic Information Listserve (E-mail);
><)> NANFA List Server (E-mail)
><)> > Subject: NANFA-- a lil' help from my friends....
><)> >
><)> >
><)> > Ok, time to put the brain in gear ;) We have an outdoor
><)> > exhibit that we
><)> > need to find the volume of. It is a "naturally"
><)> shaped exhibit with a
><)> > textured concrete bottom and a deceivingly large
><)> "volcano
><)> > like" planter in
><)> > the middle. We need to find the gallonage to be
><)> able to dose
><)> > medications.
><)> > In October, we had the system drained for
><)> repairs and so we
><)> > thought we would
><)> > be smart and put a flow meter on the system to
><)> fill it. Actually, we
><)> > thought we would go one better and put two flow
><)> meters in
><)> > line so that we
><)> > had a backup to verify our results. Well,
><)> unfortunately, the two flow
><)> > meters read vastly different amounts. So now we
><)> are back to
><)> > square one.
><)> > What we decided to do was to go the back door
><)> route. By
><)> > adding NaCl to the
><)> > system, we figure that we can measure conductivity and
><)> > extrapolate from
><)> > there. So, here is the data. Have at it, if you
><)> wouldn't mind.
><)> >
><)> >
><)> > Measurements were taken with YSI 30 conductivity
><)> meter which
><)> > was on the
><)> > temperature compensated mode.
><)> >
><)> > Day 0 conductivity 268 microsiemens (.1 ppt)
><)> at 37F
><)> > added 200 lbs of NaCl
><)> > Day 1 conductivity 1130 microsiemens (.6
><)> ppt) at 37F
><)> > added 200 lbs of NaCl
><)> > Day 2 conductivity 2080 microsiemens (1.1
><)> ppt) at 36F
><)> > added 200 lbs of NaCl
><)> > Day 3 conductivity 3075 microsiemens (1.2
><)> ppt) at 36F
><)> > added 200 lbs of NaCl
><)> > Day 4 conductivity 4160 microsiemens (2.2
><)> ppt) at 36F
><)> >
><)> >
><)> > Here are some other values that I tested:
><)> >
><)> > 1 lb of NaCl in 1 gallon of tap water (257 microsiemens)
><)> > raised conductivity
><)> > to 140 millisiemens
><)> >
><)> > 10 grams of NaCl in 1000 ml of Distilled water raised
><)> > conductivity to 17
><)> > millisiemens (9.9 ppt)
><)> >
><)> > 1 gram of NaCl in 1000ml of Distilled water raised
><)> > conductivity to 2174
><)> > microsiemens (1.1 ppt)
><)> >
><)> >
><)> > As you can see from these known values that it
><)> certainly was
><)> > not lab quality
><)> > measurements. But, for our purposes, a close
><)> figure would be
><)> > very helpful to
><)> > us. Thanks for the help.
><)> >
><)> >
><)> > Oh, and also, you don't get a grade unless you
><)> show your work ;)
><)> >
><)> >
><)> >
><)> >
><)> >
><)> >
><)> > Nick Zarlinga
><)> > Aquarium Biologist
><)> > Cleveland Metroparks Zoo
><)> > 216.661.6500 ext 4485
><)> > ----------------
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><)> > / Association"
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><)> ---------------------------
><)> /"Unless stated otherwise, comments made on this
><)> list do not necessarily
><)> / reflect the beliefs or goals of the North
><)> American Native Fishes
><)> / Association"
><)> / This is the discussion list of the North
><)> American Native Fishes Association
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/-----------------------------------------------------------------------------
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/ reflect the beliefs or goals of the North American Native Fishes
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/ nanfa-request_at_aquaria.net. For a digest version, send the command to
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/ For more information about NANFA, visit our web page, http://www.nanfa.org