Rapid Shock is a Non-Chlorine Shock Treatment for spas and hot tubs. It is a highly concentrated, fast dissolving oxygen compound that reduces and eliminates combined chlorine levels. It is very fast acting and a spa or hot tub may be used only 15 minutes after dosing. It oxidises organic contaminants. Used regularly it increases sanitiser effect. It contains a clarifying agent creating extra sparkle. It contains a minimum oxygen content of 5%. It may also be used as a non-chlorine shock for ornamental ponds and fountains. Rapid Shock is intended only for the shock treatment of spas, hot tubs, fountains and ornamental ponds. It is not a sanitiser and does not replace the need for the use of an approved sanitiser.