Dye Tracer Powder Dye Type Water Tracing Dye Color Blue Form Powder Container Size 1 lb Coverage 120 000 gal (Strong Visual) 1 200 000 gal (Light Visual) Dissolution Time 3 to 6 min Detectability less than 100 ppb NSF Certified Yes Fluorescent No Application Cooling Towers Flow Studies Lakes Rivers Ponds Leak Detection In Large Closed Loop Systems Power Plant Piping Sewer and Drain Connections Standards ANSI NSF