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Sonar RTU 1qt. L00373

SKU: 65260264  |

Factory Shipped.

May take up to 4 weeks for delivery.



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Sonar RTU 1qt. L00373

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Sonar, the leader in aquatic herbicides, now offers an easy and effective formula that requires no mixing, no special equipment, or even a boat. Now, thanks to Sonar Ready-To-Use (RTU), anyone can take control of aquatic weed management. Simply apply this improved formula from the shoreline and, within weeks, the targeted plants will begin to turn white and wilt away. Recommended for man-made or natural ponds that have limited or no outflow.

No other treatment is more effective against duckweed. Often spread from one body of water to the next by waterfowl and other wildlife, duckweed is one of the most common and most persistent aquatic weeds. And while it may look like algae, it is actually a plant. And because it reproduces so rapidly, your pond can become completely covered in duckweed in just a matter of weeks. Before your pond and its fish population and its recreational uses begin to suffer, treat with Sonar RTU. Its active ingredient, fluridone, targets and controls weeds right down to their roots. And any of the product that is not absorbed by plants is quickly broken down simply by sunlight. Sonar guarantees results. See manufacturer’s label for details.

For best and long-lasting results, apply to your pond at the first sign of weed growth. Application rates may vary, but for a ¼ acre pond with an average depth of 4 feet, one quart of Sonar RTU should be used for the initial treatment. In 21 days, a follow-up application of ½ quart should be applied. Then one more application of ½ quart should be used 42 days after the initial treatment. Sonar RTU-treated water should not be used for irrigating crops, ornamental plants, or established turf for at least 30 days after the final treatment. Similarly, do not use these treated waters for watering seedling grasses, new crops, or other plantings for 60 days following the last application.

Key Features:

  • 1 quart container
  • 3.8% fluridone
  • Easy, ready-to-use formula
  • No special equipment needed
  • Effective against a verity of aquatic weeds, including duckweed, milfoil, hydrilla, coontail, and lilies

Cannot sell to the following states: California, Connecticut, Maine, New Jersey, New York, Oregon, and Washington

SKU 65260264
Model L00373
Weight 2.0000
Color No
Size No
Width No
In Store Only No
Price $98.97
Rural King provides a defect or damage warranty within 30 days of receipt. All Manufacturing Return Policies Supersede Rural King's Return Policy.

Customer Reviews

didn't work like last year Review by Harry

The Sonar RTU didn't work this year! Maybe it was the weather. Maybe I ordered the wrong Sonar. But it looks different and didn't work at all. Very disappointing to have spent that much money and still have duck weed.

(Posted on 8/24/2015)

Still waiiting Review by Waiting

Pond was completely covered with duck weed when we bought the property. Applied first quart 2 days later it rained for a week. No results. We just applied 3rd quart. 5 days later it rained again. Getting discouraged & broke

(Posted on 6/26/2015)

Sonar RTU Review by BG

Pond was complete covered with Duckweed. After using Sonar RTU in accordance with directions. The product didn't seem to control the duckweed. I would not recommend the product.

(Posted on 9/14/2014)

Sonar RTU Review by BG

MY duckweed was out of control and completely covered the pond. The product didn't make any noticeable changes. I wouldn't recommend the product.

(Posted on 9/14/2014)

Great price, horrible automation Review by Nathan Smith

The product was as advertised and the price was better than anywhere else on the internet.

(Posted on 6/23/2014)

Works Great Review by Larry Creekmore

Used As directed Kills all the weeds and duck weed in my pond
very pleased with Sonar RTU product.
Works great.

(Posted on 6/12/2014)

Pond 2 acres Review by Sonya Barnes

I have had duckweed for years and tried many tactics to rid myself of the stuff. This product works wonders. Yes, you must purchase it every year, but it is worth it.

(Posted on 8/5/2013)

Performed as advertised Review by Tim Moore

I was very hesitant to spend almost $500 for a herbicide that I could find almost no rating information. But, my pond is in the front of my house and was totally covered by Duckweed and looked really bad. I think the turtles, fish, and frogs were being impacted by the choking weed coverage as well. So, I took a chance and gave Sonar RTU a try. It has taken four weeks, but almost all of the Duckweed is gone.

It took some time to see a difference. There was almost no noticeable difference in Duckweed coverage for the first three weeks; then, slowly, the Duckweed started to clump-up and disappear. No indication of any residual effects concerning pond life. Pond-edge grasses turned white but trees and shrubs seem fine. I will make the final third application of the product in about another two weeks.

Sonar RTU is expensive, but did the job as advertised for me. After spending much time researching, Rural King had the best price that I could find.

(Posted on 7/5/2013)

fair Review by william scherzinger

Sonar has kept the small pond from being covered by duckweed, but it's starting to multiply again. I'll have to treat it again for the 4th time. Not sure what else to use.

(Posted on 6/6/2013)

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Q & A

Product Questions

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Can I continue to allow cows and other farm animals to drink from the pond during treatment with this product.?
Is Sonar RTU effective in treating watermeal?