Sorry BV, I forgot I didn't answer, but most of the folks below had it
"right". A little less than 1 lb. per 100 gals. will give you ~.1 I don't
remember how large you "think" your pond will be, but it's pretty safe that
you could add a 20 lb. bag of salt. Using the calculator on Roark's site, if
you add 20 lbs. of salt and get a salinity of .07, you have 3,428.59 gals.
of water. If you add the same 20 lbs. of salt and get a salinity of .25,
then you have 960 gals.

To increase the accuracy, you really should subtract the background salinity
(beginning level) from the final level before you plug in the numbers.
Fr'instance, if your background level was .03, and your ending salinity was
..25, the result is .22, which means that you have 1,091.91 (1,092 -
K.I.S.S.) instead of 960. The more water you have, the more the variance, so
check before and after!

If you go to a HD or such, I think you can only buy 40 lb. bags of salt. But
if you go to a grocery store, you may pay a little more, but I think you can
get 20 lb. bags. It's nice to go with a "whole bag", because then you don't
have to weigh it. And the ounces count, so a bathroom scale won't cut it
(and it's tedious on a postage scale!) Most of the plain ol' rock salt/solar
salt that comes in blue plastic bags will do.

Lee


"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.