Monterey Mark It Blue Application Spray Colorant Concentrate 1 qt Sprinkler Valves Billions of bacteria and septic Billions of bacteria and septic specific enzymes per dose x 20 1 2 in Country Of Origin US Department Number 7 Feature 10 Text Feature 1 Text Shows where you've sprayed Feature 2 Text Eliminates waste Feature 3 Text Mark it blue will not permanently stain vegetation Feature 4 Text Spray solution blue colorant that indicates where Feature 5 Text Works great with roundup or remuda and other herbi Feature 6 Text Avoid skips and overlapping Mark it Blue is a concentrated blue colorant designed to provide temporary highly visible evidence of spray application patterns