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Saltwater hot tubs rely on a device called a saltwater electrolysis system to operate. This system maintains clean water quality by converting a small amount of salt into chlorine. Ordinary hot tubs use manually added chemicals (such as chlorine or bromine) to maintain water quality.
The biggest difference between a salt water hot tub and a regular hot tub is its water treatment system. Traditional hot tubs usually use chlorine or bromine to kill bacteria and disinfect, while salt water hot tubs use a salt water system to generate natural chlorine. The core of this system is a device called a Salt Chlorine Generator.