Bottle contains 1kg of Chlorine Granules. Used to disinfect your hot tub and kill bacteria. Available in a 1kg or 5kg tub. Freshwater Chlorinating Granules by Hot Spring are ideal for the daily dosing of your hot tub. To produce free active chlorine which kills bacteria and other potentially harmful organisms. They are rapid dissolving and have minimal impact on PH. Recommended free chlorine levels for hot tubs is: 3-5 ppm
