You are correct, chlorine (CL2) is a lot less stable than salt (NaCl) Or
Sodium Chloride.

Chlorine will effectively evapourate from water within a couple of days.
Keep in mind that in tap water sometimes they use a substance called
CHLORAMINE which is more stable than chlorine and will remain in the water
for a longer period of time.

Chloramine is a combination of Chlorine and Ammonia and is designed to be
more stable so our tap water can stay bug free for longer periods. Look into
whether your water contains Chlorine, Chloramine or both, and I suggest you
look at this web site for dechlorination options.
http://www.csd.net/~cgadd/aqua/art_chlorine.htm

The web site is centred around keeping fish, but from what I can tell you
would like to remove the chlorine for much the same reasons, so that things
will live in, around, through and from the water. If so, the information is
still useful.

Cheers and thanks for listening,

Anthony


"Tom Elliott" wrote in message
news:3dd0d87f.76226390@news...
On Tue, 12 Nov 2002 18:40:39 +1100, "Andrew G"
wrote:

"Tom Elliott" wrote in message
...
During winter, I was using my swimming pool as a storage tank - low

(snip)

Is this what you mean? Now you are cleaning it and you have to add
chlorine?
I assume this, as you say you are leaving it in the sun for the chlorine
to
evaporate?
Well going back to science, get a bucket of salt water, leave it in the
sun,
and watch the salt crystals remain. Collect the water that evaporates and
it's drinkable. So in theory, by leaving a bucket of chlorinated water in
the sun, does something similar happen? If so, then all you are doing is
losing water, and if anything else, then you are actually increasing the
concentration of chlorine, as the less water yet same amount of chlorine.
Perhaps, by not letting it evaporate, but letting it sit, the chlorine
will
sink, and you can pour the less chlorinated water off the top?

No doubt the pool water is much stronger chlorinated than tap water. I
would
do some experimenting to see what effect it has. Also, in any case, keep
it
off the foliage. I can't imagine that it is good for it.

The difference here is that salt and chlorine are different as I
understand it. Chlorine breaks down into other things when exposed to
UV light. A chlorinated swimming pool after a few sunny days has
little or no detectable chlorine, so I think it should be okay.
Perhaps I will spread it around, I don't think it could be much worse
than grey water from a washing machine.

Tom.



Tom Elliott
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