Pond dyes will improve your water quality and clarity, while maintaining its color. We have several different colors and options to choose from depending on your personal preference. Pond dyes are also the safest product to use in any preventive pond program. Crystal blue uses a proprietary formula to enhance your pond or lake with beautiful royal blue color.Clears up muddy ponds100% safe for humans, fish, livestock, pets, birds, swimming, potable water and irrigationMaintain color and clarity for up to 30 daysHelps settle out dissolved solids1 gal treats one surface acre, 4 to 6 ft deep