SePRO Sonar Q Granular Aquatic Herbicide - 8 Pounds

Item: 530142

Cannot be shipped to: AK, CA, CT, DC, HI, ME, NJ, NY, PR, RI, WA or Canada

  • Season Long Weed Control
  • Treats Floating & Submerged Weeds
  • Systemic Herbicide That Kills Roots

Sonar™ Q pellets has the same active ingredient as Sonar™ A.S. Although convenient, pellets are more expensive to use than comparable liquids. Aquatic herbicide pellets are not recommended for ponds with mucky bottoms or turbid water. Sonar™ Q aquatic weed control pellets may be used for spot treating in larger ponds or lakes.

SePRO Sonar<sup>™</sup> Q

Tech Specs

Usage Information

SePRO Sonar Q Granular Aquatic Herbicide 8 Pounds
8 Pounds
Application Granular
Temperature Restriction None
Pond Size Treated (4-6 Feet Deep) Up to 17,000 Square Feet
Shelf Life 5 Years

Dosage Rates

Treatment Area (Acres)
Sonar™Q (Pounds)
1/4 Acre 5 Pounds
1/2 Acre 10 Pounds
1 Acre 20 Pounds

Please note: Above are recommendations. Always read the product label.

How To Apply

Broadcast the Sonar™ Q onto the area to be treated using a granular spreader. Pellets will sink to the bottom of the pond. Over time, the weeds will begin to brown and die. Once completely dead, use a rake, like the Pond & Beach Rake, to remove dead weeds to prevent an accumulation of dead plant material and muck. Sonar™ Q is not recommend for ponds with mucky bottoms or turbid water.

When To Apply

Sonar™ Q has no temperature restriction, but it should be applied in early spring, at the first sign of weed growth. It can take 30-60 days to control established weed growth and up to 90 days for full protection of your pond. We recommend using pond dye to reduce sunlight exposure that can reduce treatment effectiveness.


  • Wait 30 days before using treated water for irrigation.


Replacement Parts

Here are the replacement parts for SePRO Sonar ™ Q Granular Aquatic Herbicide - 8 Pounds.

Weeds Treated

The first step towards effectively treating any pond weed is proper identification. SePRO Sonar Q Granular Aquatic Herbicide - 8 Pounds is recommended for use against each of the weeds listed below. Click on your desired weed for more information and alternate control options.

  • American Pondweed
  • Bladderwort
  • Coontail
  • Curly Leaf Pondweed
  • Eurasian Watermilfoil
  • Hydrilla/Elodea
  • Sago Pondweed
  • Southern Naiad

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