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Thread: Anti-chlorine in solid form?

  1. #1
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    Anti-chlorine in solid form?

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    I heard about some kind of crystalized anti-chlorine chemical that dissolve in water and that is more economical then solution type. Is there really such thing and if anybody knows where to get it?

    Thanks.

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    Re: Anti-chlorine in solid form?

    It's known as sodium thiosulphate, which is also called hypo by photographers who use it in developing pictures. Shops dealing in quality camera equipment and services (I imagine those around Peninsula Plaza/Shopping Centre) might have it. No idea about price though, I haven't used antichorine for a couple of years.

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    Thanks, Budak.
    Will contact my photographer friend

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    Just an update to this topic. I found a LFS selling dechlorine crystal which I believe is Sodium Thiosulphate selling at $4 for about 250g.

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    I got a 1 pound jar at a local chemical supply for $5-7 (I forget).

    Bob

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    Hi,

    I got some that are bought at $5 for a 1kg pack.

    Cheers
    Vincent
    If you truly love Nature, you will find beauty everywhere. - Vincent Van Gogh

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    What's the rationale for using crystalline anti-Cl when you could use liquid which gives faster reaction time, other than the cost factor?

    With good circulation, half of any Cl2 in the tank would probably have dissipated by the time the crystals (how big?) dissolves.

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    Re:

    [quote:f6cdde08ae="elmike"]What's the rationale for using crystalline anti-Cl when you could use liquid which gives faster reaction time, other than the cost factor?

    With good circulation, half of any Cl2 in the tank would probably have dissipated by the time the crystals (how big?) dissolves.[/quote:f6cdde08ae]

    To me, it is mainly the cost factor. The crystals I have are about 1 to 2 mm and the dissolve rather quickly.

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    I make up a solution from my crystals that I can use at one or two drops per gallon. Very cheap and reliable.

    Bob

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    Is there a formula as to how much Sodium thiosulphate is needed per n ppm of chlorine?

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    There are many posted calculations. I like this one the best. See towards end of the article.

    http://216.168.47.67/CIS-Fishnet/AFM/G29151.htm

    Bob

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