Pool Essentials Chlorinating Liquid is used for everyday swimming pool water sanitization. This easy to use liquid chlorine pool chemical effectively cleans pool water and kills bacteria. The fast acting formula kills swimming pool algae and bacteria while the calcium free formulation will not cloud swimming pool water. Pool Essentials Chlorinating Liquid is compatible with salt pool systems and is suitable for use in all types of pools, including saltwater pools. Balanced pool water is vital to swimmer's safety and comfort. Chlorinate your swimming pool on a weekly basis as part of your regular maintenance routine to maintain Free Chlorine levels at 1-4 parts per million (ppm) and keep bacteria at bay. Imbalanced swimming pool water can cause your sanitizers to loose their effectiveness, cause swimmer irritation from itchy skin and burning eyes, and damage to pool surfaces, structures and equipment. Add 13 fl. oz. of Pool Essentials Chlorinating Liquid for each 10,000 gallons of water.