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Posted by EdK on April 11, 2003 at 09:55:03:
In Reply to: Re: The WAter posted by Colchicine on April 11, 2003 at 05:58:45:
:Most decent chlorinators like Amquel and Novaqua work either instantly or within 5 min if dosed properly. Letting it sit out over night does allow the temps to equilibrate, but I can't think of any other benefit. If anything it will become more acidic from absorbing CO2.
While most dechlorinators will work very rapidly (unless the water is very colds or are not mixed into the water) there is an excellant benefit to letting water sit. Most tap water is supersaturated with gases (the bubbles that form in a cold or warm glass of water). This has a potential to cause a gas embolism in the anuran. Allowing the water to sit at least 24 and preferentially 48 hours will allow the water to reach equilibrium with the surroundings. While carbon dioxide will react with water to form carbonic acid which is a weak acid this reaction is driven by the partial pressure of the carbon dioxide in the air and usually does not affect pH to any real significance as the carbonates and other buffers found in most tap water prevent this from happening. (Municiple tap water is often buffered to be as close to 7.0 pH as economically feasible as this prevents the water from destroying the water pipes). A trick to shorten this out gassing is to use very warm water and let it cool to room temperature as this cause the out gassing to occur more quickly.