SePRO Sonar™ RTU - 1 Quart
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  • Details
  • Usage
  • Weeds Treated
  • Reviews
  • Long Lasting Weed Control
  • Effectively Treats Duckweed
  • No Mixing - Easy To Apply

Sonar™ RTU is a Ready-To-Use formula that controls most troublesome pond weeds including Duckweed. No mixing, no need for spray equipment or a boat—simply apply directly into the water from the shoreline.

Usage Information

From dosage rates to product labels, the USAGE tab contains all of the information you need to properly apply your pond care products.

SePRO Sonar RTU 1 Quart
1 Quart
Application Liquid
Temperature Restriction None
Pond Size Treated Up to 5,445 Square Feet (1/8 Acre)
Shelf Life 2 Years

Dosage Rates

Treatment Area (Acres)
Initial Application (Day 1)
Dose 2 (Day 21)
Dose 3 (Day 42)
1/8 Acre 16 Ounces 8 Ounces 8 Ounces
1/4 Acre 32 Ounces 16 Ounces 16 Ounces
1/2 Acre 64 Ounces 32 Ounces 32 Ounces
1 Acre 128 Ounces 64 Ounces 64 Ounces

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

How To Apply

Apply Sonar™ RTU directly into the water either in one location or multiple locations and Sonar™ RTU will mix throughout the pond. Sonar™ RTU should be applied with an initial application followed by two additional applications at three-week intervals. 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.

When To Apply

Apply Sonar™ RTU during sunny, dry, non-windy conditions. Best results are typically achieved by starting applications just as weeds have started to grow.


  • Wait 30 days after final treatment before using treated water for irrigation.


Weeds Treated

The first step towards effectively treating any pond weed is proper identification. SePRO Sonar™ RTU - 1 Quart 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
  • Duckweed
  • Eurasian Watermilfoil
  • Hydrilla/Elodea
  • Sago Pondweed
  • Southern Naiad

What others are saying

4 out of 5

Customer Rating

"Sonar RTU worked very well"Stonecrest II HOA of Plato Center Illinois, IL

Our subdivision entry pond was being overtaken by under water growth. We followed directions and have now applied 3 times. We did apply directly onto the under growth from the center of the pond from a little boat which may have helped. Great product gave us quick results and the pond looks much better. Only negative is that the bottles are quite pricey. Thanks Pond Guy

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