Gordon's, Gallon, Ready Pour Formula, Pondmaster Aquatic Algaecide, Liquid Chelated Copper Algaecide, Controls Aquatic Weeds Such As Hydrilla, Water Hyacinth, & Water Lettuce In Slow Moving Or Still Bodies Of Water, No Interruption Of Swimming, Fishing, Or Watering Livestock After Treatment, Use In Ornamental Ponds, Farm Ponds, Fresh Water Lakes, Fish Hatcheries, & Potable Water Reservoirs.