Hydrochloric Acid used to lower the pH of water in swimming pools and water parks. Highly concentrated. Improves comfort. Corrects pH adjustment and optimises the efficiency of the disinfectant. A pH reading of 7.2-7.6 is required, with 7.2 being the ideal level. 500ml of hydrochloric acid will lower the pH of 50,000ltrs water by five decimal points. eg. 8.0 to 7.5 approximately. Available in 23kg UN certified drums.