Chemical-free swimming pools are teeming with life

Read the full story at SmartPlanet.

To keep pool water clean and clear, the industry has always turned to chlorine. But consumer demand for alternatives has prompted the emergence of new technologies. Los Angeles Times reports.

Saltwater systems came into vogue a few years ago, and copper-and-silver ionization and ozone-gas systems are becoming increasingly popular.

And then there are the ‘biologically active’ natural swimming ponds.

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