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Sonar AS Aquatic Herbicide 8 oz

Cannot ship to: AK, CA, CT, D.C., HI, ME, NJ, NY, RI, VT, WA
  • Sonar AS Pond Herbicide
  • Sonar AS Fluridone Herbicide
  • Pond Herbicide -Systemic aquatic herbicide


Sonar AS Aquatic Herbicide for long-term control 

Sonar A.S. is a systemic aquatic herbicide formulated for long term control of aquatic weeds. Slow reaction time makes this pond treatment safe for fish. Sonar A.S. is an ideal solution for managing submerged pond weeds in bodies of water with minimal flow. Unlike other aquatic herbicides, a single application of Sonar AS can manage pond weeds for an entire year.

  • Controls most submerged weeds
  • Tank mixed, spray application
  • Whole pond treatment
  • One treatment can manage pond weeds for an entire season
  • Water can be used for swimming, fishing, & livestock immediately after application

Treats 1/4 acre, 10,890 square feet

What aquatic weeds are controlled by Sonar AS?



Water Lily

Sonar AS Product Label and Instructions

When is the best time to treat with Sonar AS?

It is best to apply Sonar AS early in the season when aquatic weeds begin growth.

Can I use Sonar AS to spot treat weeds growing in my pond?

No, Sonar AS is a whole pond treatment. This should be applied throughout the entire body of water.

How does Sonar work?

The active ingredient in Sonar is fluridone. After the Sonar is sprayed across the pond's surface, it spreads throughout the whole water body. Sonar is absorbed through the plant shoots. Once absorbed into the plant, it stops the formation of carotene, which is needed to transmit energy absorbed from chlorophyll. In the absence of carotene, plants begin to turn white. Begin noticing results in 15-30 days. Complete management of weed species in 30-90 days.

Aquatic Weed Treatment Instructions:

Mix in bucket or tank sprayer.  Proper Application Requires Mixing Sonar AS with water. Mix 8 oz of Sonar AS with 1 gallon of water. Spray or pour mixture in 3-4 spots around the pond. It is not necessary for weeds to be sprayed directly with Sonar AS. Pond should have very little flow through for at least 30 days so that the treatment is not dilluted. 3 gallon Sprayer sold here

Sonar AS Dosage Rates
Treatment Area
        Sonar         Water
10,890 sq ft         8 Ounces         1 Gallon    
21,780 sq ft         16 Ounces         2 Gallons    
43,560 sq ft         32 Ounces          4 Gallons


Active Ingredient: Fluridone 41.7%

Sonar AS Safety Data Sheet

 Cannot ship to: AK, CA, CT, D.C., HI, ME, NJ, NY, RI, VT, WA 


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Additional Information

Pond Weed Control
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