Argos is a liquid copper-based formulation containing ethanolamine chelating agents to prevent the precipitation of copper with carbonates and bicarbonates in the water. Argos effectively controls a broad range of algae. Argos has also been proven effective in controlling the rooted aquatic plant, Hydrilla verticillata. Waters treated with Argos may be used for swimming, fishing, further potable water treatment, livestock watering or irrigating turf, ornamental plants or crops after treatment.



  • Argos’ chelated copper ethanolamine complexes delivers a rapid acting, hard water stable, contact algaecide. Controls a broad range of algae in lakes, potable water reservoirs, ponds, fish hatcheries, irrigation canals, and drainage ditches. Also effective on Hydrilla, when used in combinations with Diquat Herbicide.
  • Controls floating and submersed filamentous algae species. Begin application in spring as water temperature warms to 60˚ F
  • Argos may be toxic to trout if the hardness of treated water is less than 50ppm. Do not use in water containing Koi or hybrid Goldfish
  • Excellent efficacy in a wide range of water quality conditions, including hard water systems
  • Algae and vascular plant control will last for several weeks to several months depending upon environmental conditions. Retreat as re-growth begins to appear
  • Controls Planktonic algae in 24 to 48 hours, Filamentous algae in 3 to 4 days
  • Argos is a contact mode of action herbicide in the metallic copper chemical class

AL, AR, AZ, CA, CO, CT, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME*, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY*, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA*, WI, WV, WY, DC

*state restricted pesticide