Hayward HCC 2000 HCC2000 Water Chemistry Controller. Perfect for swimming pools, spas and water features, the HCC 2000 is a powerful yet affordable microprocessor-based pH/ORP water chemistry controller. The controller features proportional feed to ensure precise water chemistry maintenance. It operates using the Oxidation-Reduction Potential (ORP) method of water analysis to ensure rapid deactivation of waterborne pathogens such as E. coli.