I used to believe that the chlorination in my city water would be enough to keep things sanitized.
Did a little research. Not that I put a lot of faith in the govt agency, I found the CDC had some guidelines for water stored.... as in a water pitcher in your fridge.... and the recommended residual chlorine for a relatively short time (on the order of a day or two, can't remember exactly) was higher than what I have coming out of the tap.
Anyway, what I do is keep my tank full. I figure stuff might be a little bit less likely to grow. Also gives me an emergency water supply.
Then when i get ready to go.... if it has been "a while" and IF i have time, I'll dump and refill. Getting ready to go this weekend, and its been sitting about 8 weeks.... so I plan on dumping it. I'm not afraid of it but figure freshening it up won't hurt!
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