Aquathol 10 Pound
Product Label SDS Sheet

Aquathol Super K Granular with potassium endothall is a selective, rapid-acting, contact herbicide. Controls submersed weeds in lakes and ponds. Works rapidly enough to be effective in both still and slow moving water. There is a wide margin of safety with respect to fish.

Aquathol Super K Granular is a convenient ready-to-use granular product. Nothing to mix or spray. Begins working on contact with submersed weeds to break down cell structure and inhibit protein synthesis. Without this ability the weed dies.

Initial results in 1 to 3 days

Full kill takes place in 1 to 2 weeks. As weeds die they drop to the bottom and decompose. Full kill takes place in 1 to 2 weeks. As weeds die they drop to the bottom and decompose. Effective anytime live weeds can be contacted.


Recommended application rates for Aquathol Super K Granular range from 0.5 to 5.0 ppm. Safe for most fish at 100 ppm or more. For most Pondweeds growing in lakes 2.0 to 4.0 ppm will give excellent control. This rate is equivalent to 0.8 to 1.6 lbs. of AQUATHOL Super K Granular per 1000 sq. ft. at an average depth of 4 feet.



10# Bag
(treats 6,000 to 12,000 sq. ft.)

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20# Bag
(treats 12,000 to 24,000 sq. ft.)
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Water Use Restrictions

Active Ingredients: Dipotassium salt of endothall
Weight % Active Ingredient: 63
EPA Reg.No. 4581-388-82695 or 70506-191
Number of Days
Human Drinking Okay under 0.1 ppm
Human Swimming 0
Human Fish Consumption 0
Animal Drinking 7 + (see label for details)
Turf Irrigation 0
Forage Irrigation 0
Food Crop Irrigation 0

Adjust quantity of material up or down depending on average depth. At a 6 ft. average depth use 50% more per 1,000 sq. ft. When treating an entire pond you can use 25% to 50% less material and still achieve excellent control. To apply AQUATHOL Super K Granular, simply broadcast the granules uniformly over the water surface by hand or use a mechanical spreader. Heavy infestations should be treated in sections 5 to 7 days apart to avoid oxygen depletion.

Aquathol Super K Example:

  • For Curly-leaf Pondweed *
    Sample 250 ft. x 100 ft. Lakeshore Lot (25,000 sq. ft.) 4 Ft average depth
    Amount of Super K Required : 10 Lbs. Aquathol Super K
  • For Mixed Weeds *
    Sample 100 ft. x 100 ft. Lakeshore Lot (10,000 sq. ft.) 4 Ft average depth
    Amount of Super K Required : 10 Lbs. Aquathol Super K

*Consult Label for Exact Doses & Important Application Directions.

For Best Results

For best results, Aquathol Super K should be applied as early as possible after weeds appear or when they are actively growing. Contact time with weeds should be at least 2 hours. In large bodies of water longer term control will result when treating a minimum of 1 acre or 100 ft. of shoreline.

Begin application in spring as water temperature warms to 50ยบ F and above. Early treatment when growth first appears or begins to create a nuisance will reduce the amount of Aquathol Super K needed. Early treatment will also reduce the amount of dead plant material which should be removed or left to naturally decompose allowing the nutrients within the dead plant material to be released into the water column.

Heavy, out of control growth may require more than one application or physical removal to gain control. For best results, use under conditions of minimal water flow.


Do not use in water containing Koi or hybrid Goldfish.

*All pesticides can be harmful to health and the environment if misused. Read the label and follow directions. Consult with your local regulatory agency before applying herbicides and algaecides to public waters. There are herbicides from other states that are either not licensed in Wisconsin or Illinois, or are not recommended by ABI.

A WI DNR Aquatic Plant Control Permit or DATCP Fish Farm License is required in WI in order to apply algaecides or herbicides. In addition ponds and lakes with overflows not contained on the property are required to obtain a WPDES permit. Illinois Residents are required to obtain NPDES permits through the Illinois EPA.

In order to apply chemicals in liquid form within Wisconsin, the applicator must be licensed with the State.

Recommendations of pesticide or treatments for specific algae or aquatic plants are provided for general information purposes only - no warranties are expressed or implied.

* We do not ship EPA registered Algaecides or Herbicides to the following states:

Alaska - California - Connecticut - Delaware -  Hawaii - New Hampshire - New Jersey - New York - Maine - Maryland - Massachusetts  -Oregon - Rhode Island - Washington State - Vermont (for additional information about these restrictions please see shipping or terms and conditions).


Michigan Shipments

Reward & Weedtrine D cannot be shipped without a permit on file.

10 Pound Bags ship via UPS
20 Pound Bags of This product ship via LTL Freight.