Care Free Boost is a pH neutral, granular disinfectant exclusively for use with the Care Free Water Care Program. It is the Shock Treatment, which is part two of this proprietary Beachcomber System. Care Free Boost is a Chlorine based disinfectant that kills bacteria, viruses and pathogens in hot tub water. It also prevents the growth of these harmful organisms in hot tub water. This product has an available Chlorine content of 62%. Care Free Boost has a relatively neutral pH value of 6.7.