Don't know about the readings, as I don't use salt, but the salt stays in
your pond until you remove it. IE: Water changes. It won't evaporate by
itself. Just incase you don't know, plants don't like very much salt.

Bob


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"*muffin*" wrote in message
...
ok, more questions (VBG)

I purchased a hydrometer which tests specific gravity & salinity in the
water.
( I wanted to test the salt content & then add salt to find out gallonage
for my pond)

when I 1st added the water,, I thought **YIKES** it read above 40!!!
but,,
dang I forgot to look at directions,,,,, it said to tap off the air
bubbles............**DUHH**

it now reads UNDER "0".. looks like maybe 2 points under (?)
the test kit reads in PPT's & they are listed in numbers from "0" to "40"
soooo how does this read as the testing goes? from the other posts its in
the ".00" readings,, do I read the markers as ".00" to ".40" ???

since the reading is UNDER "0" should I add 10 lbs of salt ( pond should
be
over 2500 gal) & get a reading? then add more to do the difference to
figure
out the gallonage? do I HAVE to wait 1 day?? or can it be checked after
the
salt has dissolved?
(HOW long does the salinity STAY in the pond?)