Aquatic Herbicide, 53.8% Glyphosate, 1-GallonFarm general, gallon, aquatic herbicide 53. 8% glyphosate, a broad spectrum post emergent weed killer, farmworks aquatic herbicide can clear your pond of cattails, alligator weed, beachgrass, giant reeds, & several invasive plants that can't wait to take over your water, eliminates targeted weeds down to the root while leaving soil & wildlife unharmed.