Chromium sol'n; 1,000 ppm.  Increases chromium in recirculating seawater systems. Application of chromium in conjunction with weekly ICP analysis typically yields intensification of pigmentation in cnidarians.  1 drop (0.05 mL) per 100.0 gal. (378.5 L), once daily to maintain NSW value for S=35.  1 drop per 63.5 gal. (240.4 L) to establish NSW value for S=35.  1,000 ppm chromium, derived from chromium chloride (hydrated source, ACS Reagent).