Safe for use in water gardens that contain live fish and plants, AquaBac kills developing mosquitoes larvae before they become breeding, biting adults, including those that may transmit West Nile virus, equine encephalitis or heart worm disease. It disperses evenly in the water and will last up to 10 days, depending upon the application site. Can be applied to areas used by, or in contact with, humans, animals, horses, livestock, pets, birds, fish or wildlife. Apply 1 teaspoon (5 ml) of product per square meter.(ie 1 meter x 2 meter or ~3′ x 6′ pond need 2 teaspoons or 10 ml). Made and certified for use in Canada.