SePRO Total Pond - Blue® Lake & Pond Colorant 1 Gallon BottleImparts a natural blue color to treated waters SePRO Total Pond Blue is a highly concentrated blend of non toxic, odorless, environmentally friendly dyes, formulated to beautify ponds and improve the appearance of surface waters by imparting a natural blue color to ponds, water hazards, lakes and fountains. Long lasting, easy to use Enhances surface reflections and appearance Non toxic to turfgrass, birds, mammals, fish or other aquatic species SePRO