APPLICATION: AQL B-600 is a supplemental boiler treatment providing hydrate (OH) alkalinity. An effective boiler water treatment program requires hydrate (OH) alkalinity for the preferential precipitation of hardness into a fluid non-adherent sludge. This product is recommended for use in steam boilers on a phosphate control or a carbonate control program if the alkalinity level is too low. AQL B-600 may be used in cooling tower systems when natural water alkalinity is not sufficient to raise pH to recommended operating levels.