A friend of mine recently installed an above-ground pool (IIRC, 6000 gallon). The pool came with a floating ball that slowly dissolves chlorine tablets to kill bacteria and other critters. This doesn't sound like it would control the Cl levels very well. Does this type of system actually work or is there a better way? What's your take on the non-chlorine products (eg, Baquacil)? Can you suggest a link(s) to a good "swimming pool chemistry" page? TIA
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