When Zyax Chloro Maxx 90 TCCA 90 Swimming Pool Water Treatment Granules are added to the Pool water, it dissolves in water and releases Hypochlorous acid (which increases free chlorine in water) and Cyanuric acid (which acts as a chlorine stabilizer). The addition of Chloro Maxx 90 pool & spa water treatment granules to your Pool or Spa in the correct dosage will ensure perfectly clean and hygienic water having no chlorine smell or irritation.