Barium sol'n; 5,000 ppm.  Increases barium in recirculating seawater systems.  Maintenance of barium concentration within close confines of standardized seawater value (as defined by salinity) supports biogenic aragonite formation and secretion by reef building invertebrates.
 
1 drop per 4.811 gal. (18.208 L) to establish NSW value for S=35.  5,000 ppm barium, derived from barium chloride (hydrated source, ACS Reagent).  Dose as required, according to ICP analysis.