A nonselective herbicide for both submerged and floating pond weeds. Effective in controlling duckweed, water hyacinth, pondweed, slender leaf pond weed, coontail, and other aquatic weeds. Can be blended with other herbicides for many uses. Tsunami DQ is a diquant dibromide based herbicide. Diquat formula kills surface and submerged weeds that are copper-resistant. Consists of 37.3% diquat dibromide. 2 to 8 quart per surface acre depending on infestation and type of weed for aquatics. 32 oz. bottle. EPA regulations prohibit the sale of this product in the following states: AR, CT, MI, NH, NJ, NY, and CA.