BV,

You can run up to 0.3% and not kill anything except the oxygenators. I have
tried to keep my ponds at 0.1% for years. I don't have any of the
oxygenators but lotus, lilies, parrots feather, hyacinths, lettuce, taro,
canna, and a host of other plants have never seen fresh water.

When you run the test, the standard test kit uses a 5cc test tube and one
drop to color change equals 0.01%, so for 0.1% you would need 10 drops. For
the calculations, I would find a much larger test tube, like a drinking
glass, and fill it with 10 of the test tubes of water. Then each drop would
give a resolution of 0.001%. This will result in a much more accurate
determination of the quantity of water in the pond.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html


"BenignVanilla" m wrote in
message ...
"Lee Brouillet" wrote in message
...
BV, go to Roark's site:
http://www.click2roark.com

Register (if you're not already) - it's safe (no spam or nothin').
Scroll
down the left side of the screen and you'll find the calculator (and a
bunch
of others he has). Basically, you take a salt reading in your pond and
make
note of it. Then you add a *known weight* of salt, be it 10 lbs. or
whatever, then wait a day and take another reading. You plug in the
info,
and the calculator tells you the gallonage.

snip

How much salt can you add safely? I don't want to kill my plants, and I
don't want to ruin the water for fish (which I'd like to add soon).

BV.