Calcor, a specialized blend of calcite (calcium carbonate) and Corosex (magnesium oxide), delivers efficient pH neutralization through complementary mineral dissolution rates. The fast-acting Corosex provides rapid initial pH correction, while calcite offers slower, sustained neutralization for long-term stability. This dual-action combination allows for effective treatment of highly acidic water while requiring less contact time than calcite alone. The materials' combined density profile reduces media loss during backwashing, making it cost-effective for both residential and commercial applications where aggressive pH correction is needed. The synergistic blend provides more consistent pH control than either material alone, particularly in waters with high carbon dioxide content.