Crystal Blue® Blue Lake and Pond Colorant
Crystal Blue® uses a proprietary formula to enhance your pond or lake with a beautiful royal blue color all year long. Clears up muddy ponds.100% safe for humans, fish, livestock, pets, birds, swimming, potable water and irrigation. Maintains color and clarity all year long. Helps settle out dissolved solids. 1 gallon treats 1 surface acre, 4 - 6 feet deep.