This 4 pack of CrystalClear WSP TrueBlue Pond Dye Packets is formulated to provide lakes and ponds a vibrant blue color. This pond dye shades and protects to keep the water clear. Two packets of TrueBlue Dye will treat up to one surface acre that is four to six ft. deep for several months. Water treated with these dye packets may be used for recreation, fishing, and other activities immediately after treatment. Safe for all aquatic life and domestic animals. There is no need to cut, tear or pour the dye packets, simply toss the dye packets in several areas around the pond - no mixing required. Two packets of this powerful, safe pond dye is equivalent to one gal. of other diluted pond and lake colorants.