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Concentrated Contact Herbicide Aquathol® K by United Phosphorus, Inc. 1 Gallon


Aquathol K is one of the most versatile and effective aquatic herbicides ever developed that can provide season long control of a broad spectrum of submerged weeds often found in small lakes and ponds.  Aquathol K is not toxic to fish or other aquatic organisms, and has a relatively short half-life in the water.  Aquathol K provides control of aquatic weeds in a relatively short time, generally 3-4 weeks, and can provide long-term control depending on the application timing and the target species.  There are no restrictions on treated water for swimming, fishing or irrigation.

3 in stock (can be backordered)


Ready to use contact herbicide provides effective control for many stubborn aquatic weeds!

  • Ready-to-Use concentrated contact herbicide
  • Active ingredient Dipotassium salt of endothall 40.3%
  • Can provide season-long control of many nuisance plants including (for full list see product label):
    • Coontail
    • Sago Pondweed
    • Hydrilla
    • Horned Pondweed
    • Curlyleaf
    • Naiad
    • Milfoil
    • Parrotfeather
    • Largeleaf Pondweed
    • Illinois Pondweed
    • Curlyleaf
  • Short residual contact time (12-48 hours) makes it effective in still and slow moving water
  • Safe for environment, birds, fish and wildlife
  • 1 Gallon
  • Best if applied across waterbody via backpack sprayer and combined with a surfactant/adjuvant like Cide-Kick II
  • Apply when plants are present. Product may be sprayed on the water or injected below the water surface.  Aquathol K may be applied as a concentrate or diluted in water depending on equipment used (see product label for application methods and rates).
  • Due to governmental restrictions, we do not ship EPA registered herbicides and algaecides to the following states: AK, CA, CT, DE, HI, NH, NJ, MA, MD, ME, OR, RI, WA, & VT.  *Restricted use pesticide in Michigan and New York. Must provide a copy of your pesticides applicators license prior to purchasing this product in Michigan or New York.
  • See Product Label and Safety Data Sheet below for usage directions.  Use only as directed.

Learn More:

Aquathol® K by United Phosphorus, Inc. Product Label

Aquathol® K by United Phosphorus, Inc. Safety Data Sheet

Additional information

Weight24 lbs
Dimensions12 × 12 × 12 in


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