Pond Keeper Blue Lake Dye is a professional strength, concentrated blue lake colorant formulated to treat commercial ponds, farm ponds, small lakes and other large water features. Our lake dye helps filter out sunlight as well as creating an aesthetically pleasing appearance to the water by offering a natural blue look. Pond Keeper Blue Lake Dye can be mixed quickly and evenly throughout the lake with the use of a fountain, aerator or similar mechanical device. Pond Keeper Blue Lake Dye benefits: * Natural blue look * Filters sunlight * Will not stain fish, birds, plants or pets once added to water * Non toxic * Compatible with most herbicides and algaecides * Safe for fish, plants, pets and people To ensure your pond/ lake maintains a clear blue look, the use of Pond Keeper beneficial pond bacteria is recommended in conjunction with Pond Keeper Blue Lake Dye. APPLICATION 32 fluid ounces tints 1 surface acre of pond water between 4-8 ft. deep. To ensure fast, even distribution, apply product at multiple points in the pond. Re-apply as needed.