• Harpoon® Aquatic Herbicide is a chelated copper formulation that controls copper sensitive aquatic plants. No irrigation restrictions means this product is great for areas where excessive weed growth interferes with irrigation. 
    • Ideal for sites, like golf courses, where water use cannot be restricted
    • Controls listed species of the Hydrocharitaceae family including Hydrilla, Egeria (Brazilian Elodea), Naiads, and Elodea
    • Also effective on Coontail, Water Lettuce, Water Hyacinth, Giant Salvinia, Common Salvinia, Myriophyllum spp., and members of the Potamogetonaceae family.
    • Available in liquid and granular formulation

  • Product Details

    • Available in 40 pound bags
    • Contains copper-ethylenediamine complex
    • US EPA Registration No. 8959-55 (Granular)
    • Liquid available in 2.5 (2 units in a case), 30 and 275 gallon containers
    • Contains copper-ethylenediamine complex
    • US EPA Registration No. 8959-55 (Liquid)

  • Application

    Apply evenly as either surface or subsurface application, using equipment that accurately and efficiently applies product to target growth. 
    For use in: slow moving or quiescent bodies of water, including golf course, ornamental, fish and fire ponds; fresh water lakes, fish hatcheries and potable water reservoirs.

  • Regulatory

    Treated water can be used immediately for irrigating, animal consumption, swimming, or fishing. Do not use in waters containing Koi and hybrid goldfish. Not intended for use in small volume, garden pond systems. 
  • This product is registered with the U.S. Environmental Protection Agency (USEPA) in the following states. Registration status may be subject to change.
    For specifics on aquatic pesticide application permitting, contact your local state agency. Click here for a list of agencies.
    Alabama
    Arizona
    Arkansas
    California
    Colorado
    ​Connecticut*
    Delaware
    Florida
    Georgia
    Hawaii
    Idaho
    Illinois
    Indiana
    Iowa
    Kansas
    Kentucky
    Louisiana
    Maine
    Maryland
    ​    Massachusetts
    Michigan
    Minnesota
    Mississippi
    Missouri
    Montana
    Nebraska
    Nevada
    New Hampshire
    New Jersey
    New Mexico
    New York
    North Carolina
    North Dakota*
    Ohio
    Oklahoma
    Oregon
    Pennsylvania
    Rhode Island
    South Carolina
    South Dakota
    Tennessee
    Texas
    Utah
    Vermont
    Virginia
    Washington
    West Virginia
    Wisconsin
    Wyoming
    Puerto Rico (2.5 gal and 40 lb only)

    ​
    *Granular only

Kills nuisance weeds like Water Hyacinth without restricting water use

Water Care Solutions

As the lake and pond care experts for over 50 years, we are dedicated to providing complete solutions for your water.