Why do you "close" a pool?

JasonLion said:
The amount of chlorine you need goes way down as the water gets colder. Also, SWGs don't work so well when the water gets colder. Many of them turn off completely around 50 or 55 degrees. So you may need to switch to bleach if the water gets cold enough.
Cool man, I appreciate the feedback..
I didn't think I'd be checking the chlorine levels over the winter season.. but I guess I will watch and add bleach as necessary.

Thanks!
 
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