In the Swim: Alternatives to Pool Chlorine

A green clean for your pool.

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Looking for something less toxic than chlorine to control swimming pool bacteria and algae? Check out these alternatives:

• A chlorine replacement called PHMB or biguanide (polyhexamethylene biguanide) is less irritating than chlorine. Brands include Baquacil (Baquacil.com) and SoftSwim (BioGuard.com).

Ozone cleaning system: Installed into your pool to keep water ­naturally sanitized without ­chlorine; effectively used in Europe for more than thirty years. Brand suggestions: SunshinePool.comOzonePureWater.com.

Mineral treatments: Minerals such as silver and copper destroy bacteria and algae, reducing the amount of chlorine you need by about 90 percent. Brands include Nature2 (Nature2.com).

For more information: Chlorine-Free Products Association, (847) 658-6104.