Pond Champs 11700 Algae X 1 Gallon Algaecide/Herbicide Not Safe for Koi, Goldfish or Trout 1 Gallon Treats 1 Surface Acre 4-6 foot deep Waters treated with this product may be used immediately for fishing, swimming, livestock, or irrigating or drinking. Contains a professional grade 19.8% metallic copper equivalent Contains chelated copper which stays in solution to continue controlling a broad range of algae well after application.