I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Harpoon® Granular Aquatic Herbicide sinks directly to submerged vegetation, targeting nuisance aquatic weeds where they grow while allowing continued use of treated water when applied according to label directions.
Granular formula targets submerged vegetation at the root zone
Continue swimming, fishing, and irrigation when applied per label
Flexible application for targeted or large-scale control
Controls a broad spectrum of aquatic weeds
Trusted by lake managers and aquatic professionals
Simple to apply with standard equipment
Identify problem aquatic vegetation in your pond or lake
Apply Harpoon granules to affected areas per label directions
Granules sink to the bottom and target weeds where they grow
Bottom-up treatment approach
Broad-spectrum weed control
No waiting period for irrigation
Continued swimming and fishing access
Flexible treatment options
Trusted copper-based technology
Application Rate
40–240 lbs per acre-foot
Active Ingredient
Copper Ethylenediamine Complex – 9.87%
Treatment Options
Spot Treatments & Large-Scale Treatments
Suitable For
Ponds, Lakes, Golf Courses, HOAs
Target nuisance aquatic weeds at the source with Harpoon® Granular Aquatic Herbicide and enjoy healthier, more accessible waterways
