Diquat Dibromide Aquatic Weed Killer for Lakes and Ponds | Aquatic Herbicide - 4 Gallon Case AQUATIC HERBICIDE - Non-selective contact killer. Effects visible in only a few days. Active ingredient: Diquat Dibromide. SAFE TO USE - Safe to use in ponds, lakes, creeks, streams etc. WILL NOT harm fish or wildlife. KILLS MOST - Kills most forms of plant growth without damage to the soil. DILUTE 8:1 with water to spray weeds on ground or above the water surface or use at full strength. EFFECTIVE AGAINST - Broad leaf weeds, Grasses, Annual and perennial weeds, Aquatic Weeds, Algae, Cattails and Duckweed. NOT FOR SALE IN THESE STATES - AK, DE, HI, ME, MI, NH, NJ, NY, ND, VT, DC