Flumigard Aquatic Herbicide delivers powerful, fast-acting control of invasive floating and submerged weeds, including duckweed, watermeal, hydrilla, milfoil, curlyleaf pondweed, and cabomba. Formulated with 51% Flumioxazin—the same active ingredient found in Clipper® herbicide—Flumigard provides visible results in 7–14 days without leaving behind pond sediment or residue. It’s completely safe for use in lakes, ponds, and water features, with no restrictions on swimming or fishing after treatment.

This water-soluble granular herbicide is easy to mix, apply, and handle, offering reduced PPE requirements and consistent results. Flumigard works swiftly within the water column and dissipates quickly, making it ideal for long-term duckweed and watermeal control without buildup or environmental impact. For best performance, apply 12–16 oz per acre for surface treatments, and pair with an aquatic surfactant such as Cide-Kick II to maximize contact and penetration on tough aquatic vegetation.

Whether you’re managing a backyard pond, golf course lake, or larger body of water, Flumigard Aquatic Herbicide is our #1 choice for controlling duckweed, watermeal, and other nuisance aquatic weeds—delivering professional-grade results safely, quickly, and effectively.

 Cannot ship to: AK, CA, CT, D.C., HI, ME, NJ, NY, RI, VT, WA, or Canada