Dye Tracer Wax Donuts Dye Type Water Tracing Dye Color Yellow/Green Form Wax Container Size 32 oz Coverage 7 400 gal (Strong Visual) 74 000 gal (Light Visual) Dissolution Time 3 to 5 hr Detectability less than 100 ppb NSF Certified Yes Fluorescent Yes Application Examine Water Movement Current Flow (In springs streams lakes etc.) Flow Mapping Tracing and Time Studies Pollution Studies (Discharge Rate of Flow Mixing Diffusion and Dispersion Circulation) Standards ANSI NSF