Sonar A.S. 128 oz 1 gallon Herbicide
Sonar A.S. 128 oz 1 gallon Herbicide
$2,45188
Sonar® A.S. helps reclaim ponds and lakes with a liquid fluridone program built for whole-waterbody control in minimal-flow water. This EPA-registered aquatic herbicide moves through treated water, reaches weeds systemically, and can begin showing herbicidal symptoms in 7 to 10 days, with control developing as the labeled concentration is maintained over time.
- Visible symptom cue; whitening or pinking can begin in 7 to 10 days
- Whole-pond fit; liquid fluridone disperses through treated low-flow water
- Season-long potential; one planned treatment can support extended control
- Selective management; targets many susceptible floating and submersed weeds
- Water-use clarity; fishing, swimming, and livestock use stay unrestricted
- Label-backed confidence; professional aquatic herbicide with ppb-based dosing
Choose Sonar® A.S. when you need systemic, whole-waterbody control.
Always follow label directions.
Recommended companion treatment program
NT-MAX Lake & Pond Clarifier Plus Sludge & Muck Digester Rapidly restore crystal clear conditions in lakes, ponds, and lagoons using NT-MAX, a high-performance biological clarifier powered by….
After using Sonar AS, contact tech support before applying NT-MAX Lake & Pond Clarifier Plus Sludge & Muck Digester.
Bundle savings may be available below when eligible.
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Product Description
Whole-Waterbody Control for Susceptible Pond and Lake Weeds
Sonar® A.S. is built for buyers who need systemic, whole-waterbody weed control instead of quick burn-down. Its liquid fluridone formulation disperses through treated water, making it a strong fit for ponds, lakes, reservoirs, and qualifying canals where the labeled concentration can be maintained long enough for control. That concentration-based approach is especially useful in minimal-flow water.
Key Features & Benefits
| Feature | Benefit |
|---|---|
| Liquid aqueous solution | Spreads through treated water for whole-site programs. |
| 41.7% fluridone | Provides systemic control of susceptible aquatic weeds. |
| Minimal-flow fit | Best for sites that can hold the labeled concentration. |
| Selective-use potential | Lower ppb programs can support more selective goals. |
| No algae control | Helps you plan a complementary algae strategy. |
Directions & Dosing Snapshot
| Use Case | Label Rate | Application Notes |
|---|---|---|
| Ponds, single application | 45 to 90 ppb | Use the higher end for dense weed mass, harder species, or smaller shallow ponds; annual total must not exceed 90 ppb. |
| Whole lakes or reservoirs, single application | 10 to 90 ppb | Choose the rate that matches the management goal. |
| Whole lakes or reservoirs, split or multiple program | Initial 4 to 50 ppb | Maintain concentration for at least 45 days; annual total must not exceed 150 ppb. |
| Partial lake or reservoir treatment more than ¼ mile from a functioning potable water intake | 30 to 150 ppb | Use the higher end where dilution with untreated water is expected. |
| Treatment area within ¼ mile of a functioning potable water intake | No single application above 20 ppb | Split or multiple programs require a FasTEST; annual total must not exceed 150 ppb. |
| Static drainage or irrigation canals | 30 to 150 ppb per treated surface acre | Maximum annual total is 150 ppb. |
| Moving water canals | Maintain 15 to 40 ppb | Restrict or reduce flow when possible and hold concentration for at least 45 days. |
| Rate formula and dry or de-watered sediments | Average water depth (ft) × desired ppb × 0.0027; dry sediments: max 2 qt per surface acre | Multiply quarts by 32 for fluid ounces; dry sites use 30 to 100 gallons of spray solution per surface acre. |
Always follow the full label for complete directions, restrictions, and site-specific requirements.
Comparison Table
| Sonar® A.S. | Slow-release pellet fluridone program | Contact aquatic herbicide treatment | Biological pond-treatment program | |
|---|---|---|---|---|
| Control style | Systemic fluridone in treated water | Systemic fluridone, slow release | Varies by chemistry and label | Microbial maintenance |
| Best fit | Whole-pond or lake treatment in minimal flow | Flow-challenged fluridone planning | Spot-treatment goals; varies by label | Organic-load support |
| Timing profile | Symptoms 7 to 10 days; management can take 30 to 90 days | Varies by label | Varies by chemistry and label | Gradual program |
| Algae control | No | No | Varies by chemistry and label | Indirect only |
| Dosing logic | ppb and water-depth based | Product-specific and label-based | Product-specific and label-based | Routine schedule |
Why Choose a systemic aquatic herbicide?
- Whole-waterbody reach: Sonar® A.S. disperses through treated water instead of only affecting what it directly touches.
- Planning flexibility: The label lets you match the program to water depth, treatment area, water movement, and selectivity goals.
- Long-game control: When the labeled concentration is maintained long enough, Sonar® A.S. supports extended management instead of short-lived top growth suppression.
This product is distributed by NewTechBio as an authorized reseller. Specifications, treatment rates, and performance claims are sourced from the official EPA-approved manufacturer label and published documentation. NewTechBio does not independently verify manufacturer claims. Always read and follow the label.
Last updated for listing accuracy: 05/17/2026
What is Sonar A.S. and what does it help control?
Is Sonar A.S. the right fit for my pond or lake?
Will Sonar A.S. control watermeal?
How much water does Sonar AS treat?
How fast does Sonar A.S. work, and why can the problem come back later?
Are there water-use restrictions after treatment?
Does Sonar A.S. work on algae?
When is the best time to apply Sonar A.S.?
How is Sonar A.S. applied?
What should I check before I buy or treat?
Products related to this item
Product Details
Important Information
SDS: View Safety Data Sheet (PDF)
LABEL (Directions & Rates): View Product Label (PDF)
Comments/Other: Review the Product Label and SDS for directions, rates, and safety information.
Certifications / Registrations: EPA registered
Origin: Made in the USA
Feature: High Purity
Product Form: Liquid
Product Details
Whole-Waterbody Control for Susceptible Pond and Lake Weeds
Sonar® A.S. is built for buyers who need systemic, whole-waterbody weed control instead of quick burn-down. Its liquid fluridone formulation disperses through treated water, making it a strong fit for ponds, lakes, reservoirs, and qualifying canals where the labeled concentration can be maintained long enough for control. That concentration-based approach is especially useful in minimal-flow water.
Key Features & Benefits
| Feature | Benefit |
|---|---|
| Liquid aqueous solution | Spreads through treated water for whole-site programs. |
| 41.7% fluridone | Provides systemic control of susceptible aquatic weeds. |
| Minimal-flow fit | Best for sites that can hold the labeled concentration. |
| Selective-use potential | Lower ppb programs can support more selective goals. |
| No algae control | Helps you plan a complementary algae strategy. |
Directions & Dosing Snapshot
| Use Case | Label Rate | Application Notes |
|---|---|---|
| Ponds, single application | 45 to 90 ppb | Use the higher end for dense weed mass, harder species, or smaller shallow ponds; annual total must not exceed 90 ppb. |
| Whole lakes or reservoirs, single application | 10 to 90 ppb | Choose the rate that matches the management goal. |
| Whole lakes or reservoirs, split or multiple program | Initial 4 to 50 ppb | Maintain concentration for at least 45 days; annual total must not exceed 150 ppb. |
| Partial lake or reservoir treatment more than ¼ mile from a functioning potable water intake | 30 to 150 ppb | Use the higher end where dilution with untreated water is expected. |
| Treatment area within ¼ mile of a functioning potable water intake | No single application above 20 ppb | Split or multiple programs require a FasTEST; annual total must not exceed 150 ppb. |
| Static drainage or irrigation canals | 30 to 150 ppb per treated surface acre | Maximum annual total is 150 ppb. |
| Moving water canals | Maintain 15 to 40 ppb | Restrict or reduce flow when possible and hold concentration for at least 45 days. |
| Rate formula and dry or de-watered sediments | Average water depth (ft) × desired ppb × 0.0027; dry sediments: max 2 qt per surface acre | Multiply quarts by 32 for fluid ounces; dry sites use 30 to 100 gallons of spray solution per surface acre. |
Always follow the full label for complete directions, restrictions, and site-specific requirements.
Comparison Table
| Sonar® A.S. | Slow-release pellet fluridone program | Contact aquatic herbicide treatment | Biological pond-treatment program | |
|---|---|---|---|---|
| Control style | Systemic fluridone in treated water | Systemic fluridone, slow release | Varies by chemistry and label | Microbial maintenance |
| Best fit | Whole-pond or lake treatment in minimal flow | Flow-challenged fluridone planning | Spot-treatment goals; varies by label | Organic-load support |
| Timing profile | Symptoms 7 to 10 days; management can take 30 to 90 days | Varies by label | Varies by chemistry and label | Gradual program |
| Algae control | No | No | Varies by chemistry and label | Indirect only |
| Dosing logic | ppb and water-depth based | Product-specific and label-based | Product-specific and label-based | Routine schedule |
Why Choose a systemic aquatic herbicide?
- Whole-waterbody reach: Sonar® A.S. disperses through treated water instead of only affecting what it directly touches.
- Planning flexibility: The label lets you match the program to water depth, treatment area, water movement, and selectivity goals.
- Long-game control: When the labeled concentration is maintained long enough, Sonar® A.S. supports extended management instead of short-lived top growth suppression.
SDS: View Safety Data Sheet (PDF)
LABEL (Directions & Rates): View Product Label (PDF)
Comments/Other: Review the Product Label and SDS for directions, rates, and safety information.
Certifications / Registrations: EPA registered
Origin: Made in the USA
Feature: High Purity
Product Form: Liquid
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Reviews
Verified Purchase
I used chatgpt to find these guys who have the best price. Called in and spoke with customer service. Off to the races. Waiting to see!
Verified Purchase
We were completely freaked out but once we started to see the difference life was great again! We have flow in our pond so needed twice as much as we thought, but no more weeds! Dealt with weeds for many years - no more!
Verified Purchase
I use Sonar brand only. Unlike the cheap stuff, it seems like it always gets the job done.
Verified Purchase
This product performed as stated on duck weed. Highly recommended just use as directed on the label.
Verified Purchase
We have two 1 acre ponds at our RV park and they were getting pretty nasty with sludge and weeds. We tried Ntmax along with Sonar and added the blue dye. Man, what a difference! The sludge is breaking down, the pondweed is mostly gone. The water is now crystal clear with a nice deep blue color that looks right. Our guests have even commented on how good the ponds look. Super happy with the results.
Verified Purchase
Pour in sprayer. Add water. Spray. Make sure you purchase enoguh last year we wasted money getting too little. Costs a bit but worth it.
Verified Purchase
Finally get to see our water this year. Good stuff. Easy.
Verified Purchase
Expensive but awesome product. Did exactly what it was supposed to do. Will be back if needed.
Verified Purchase
My entire 1/4 acre pond was covered with duckweed which showed up last year and came back this year with a vengeance. I applied the product and was shocked at how it wiped out all of the duckweed within 20 days. I cut the treatment in doses and applied at day 1, 7 and 21 days. Perfect product.
Verified Purchase
Gets the job done. Easy to mix. Will buy again.
Verified Purchase
Worked in 2 treatment and took about 2 months.
Verified Purchase
This brand works for duckweed in 2 weeks. We have a small 50' x 60' yard pond which was covered with duckweed and another unidentified plant. Applied the product from the shoreline with a sprayer and it cleared the pond of both weeds.
Verified Purchase
We host events and could not afford another year of our lake looking miserable. I did research and found Newtechbio and called in for help. The people there are so very helpful. They explained what was happening to our water and how we were going to attack it. I honestly did not expect to spend what I spent, but after treating the lake with their products, the duckweed is finally gone and we are ecstatic! The lake looks absolutely perfect and that's one less thing to worry about! Products used: 1 gallon of Sonar, 4 buckets of NT-MAX lake treatment, 1 gallon of weed killer and a case of Perfect Natural dye.
