Crystal Blue Tsunami Aquatic Herbicide Pond Treatment is a non-selective herbicide for both submerged and floating pond weed control. Our products are effective in controlling duckweed, water hyacinth, pondweed, slender leaf pond weed, coontail and other aquatic weeds. Tsunami DQ pond treatment can be blended with other herbicides for many uses. Tsunami DQ is a diquat dibromide based herbicide. Diquat formula kills surface and submerged weeds that are copper resistant Herbicide pond treatment is effective in controlling hard-to-kill weeds like duckweed Consists of 37.3% diquat dibromide 2-8 qt. per surface acre depending on infestation and type of weed for aquatics See label for restrictions Use Plex Mate to enhance effects when treating floating marginal weeds 1 qt. bottle of landscape and aquatic herbicide