finding total gal. by adding salt

joe_09(z7 ny)June 16, 2013

does anybody have a formula to find total gal of water in a pond by adding lbs of salt and measuring the specific gravity

Thank you for reporting this comment. Undo

Nice thought, but I believe a hygrometer would be too insensitive to detect a useful value for you. Admittedly, I have never understood why some people add any salt to ponds. However, I assume that the added concentration would be far less than ocean levels.

Normal saline which is essentially ocean concentration is 0.9% NaCl. That is 0.9 grams in 100 ml of water. That ocean concentration has a sp. gr. of 1.0046. If, for example, you were to add one tenth ocean salt concentration, that is 0.09 g/100ml, I believe the change from pure water would be from 1.0000 to 1.0005. That would not even be on the scale of a hygrometer. Twice that conc would be 1.001 or barely readable. You would do much better by math. Now, if you have a friend who works in a clinical lab like I used to do, you could get an accurate sodium reading if your friend was willing to slip a sample in. Not very likely I suspect.

    Bookmark   June 16, 2013 at 10:17PM
Thank you for reporting this comment. Undo

Do you want to do this because your pond is such an irregular shape and depth that it makes it difficult to get exact gallons?

    Bookmark   June 17, 2013 at 1:02PM
Thank you for reporting this comment. Undo
joe_09(z7 ny)

yes i have an hour glass shape pond.what i was thinking if i added 160 lbs. of salt and it brought the sp. gr. to 1.003,how many gal of water would there be.

    Bookmark   June 17, 2013 at 6:40PM
Thank you for reporting this comment. Undo

Check out the Marine section of your LFS or online. You can buy Hydrometers that you drop water on then it's like a spy glass you look through and it tells you the Specific gravity. They work very well with low levels too. I think there about ã50 to buy but are very accurate.

    Bookmark   June 19, 2013 at 2:31AM
Thank you for reporting this comment. Undo
joe_09(z7 ny)

i found a formula and will try it.

Vol. of water=120 x lbs of salt /salinity
i have a hydrometer and will let you know how i make out.

    Bookmark   June 19, 2013 at 7:47AM
Sign Up to comment
More Discussions
Snake is eating my frog--Help!!
I looked out my second floor window and saw some movement...
Herron attack
Just want to vent. The day before Christmas I went...
New container water garden/fish pond
Hi everyone! We have wanted to create a water garden/fish...
Silicone brand - does it matter?
Hi all! So I'm currently repairing my first pathetic...
betta anger issues
Hi guys. I have 3 bettas 1 male 2 female. The male...
© 2015 Houzz Inc. Houzz® The new way to design your home™