Why not use liquid chorine instead of bleach ?

[giroup01]

You typically use a nickel or iron catalyst in the bleach production process and trace metals that remain in the bleach cause it to rapidly break down. So, you are best to stick with 6% or lower bleach - as you know that you will actually be getting what you pay for.

As far as the temps in Canada, Montreal can actually be hotter at times in the summer than NYC!

Yup that's exactly what I read somewhere, temperature, pH and metal content break it down to various degrees. Thanks for confirming that.

As for Montreal, yes, sometimes it does get quite hot here. I hope CarlD saw the humour in my last post, we don't really have fleece lined swimwear... yet!

[KurtV]

Here's a pretty readable paper on sodium hypochlorite production and use. On about the thrid page, paragraph 2.4, it explains the breakdown process. Bottom line, as you double the strength you quadruple the breakdown rate.

http://www.odysseymanufacturing.com/bleach_information.doc