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Description
best herbicide for duckweed Sonar AS Aquatic Herbicide for Duckweed & Pond Weed ControlSonar AS Aquatic Herbicide is a professional grade systemic aquatic herbicide trusted for long term selective control of invasive aquatic weeds in lakes, ponds, reservoirs, irrigation canals, and other freshwater systems. Powered by fluridone, Sonar AS provides season long or year long control of many troublesome aquatic weeds with a single application, making it one of the most effective and economical aquatic vegetation management solutions
Sonar AS Aquatic Herbicide is a professional-grade systemic aquatic herbicide trusted for long-term selective control of invasive aquatic weeds in lakes, ponds, reservoirs, irrigation canals, and other freshwater systems. Powered by fluridone, Sonar AS provides season-long or year-long control of many troublesome aquatic weeds with a single application, making it one of the most effective and economical aquatic vegetation management solutions available. Widely recognized as the industry standard for duckweed control, Sonar AS slowly disrupts carotenoid production in susceptible aquatic plants, leading to gradual bleaching and plant death while minimizing oxygen depletion and water quality disruption often associated with rapid vegetation collapse. Sonar is highly effective on duckweed, hydrilla, coontail, Eurasian watermilfoil, bladderwort, and other labeled submerged and floating aquatic weeds. Unlike many aquatic herbicides, Sonar AS has minimal restrictions on recreational water use following application. Swimming, fishing, and livestock watering may continue according to label directions, though irrigation restrictions may apply for certain sites and crops. Developed by SePRO, a recognized leader in aquatic plant management, Sonar AS has been trusted by professional aquatic applicators and lake managers throughout the United States for decades.Features & Benefits
- ✅ Professional aquatic herbicide for long-term weed control
- ✅ Provides season-long or year-long control with a single treatment
- ✅ Industry-leading control of duckweed and other floating weeds
- ✅ Selective systemic activity with gradual plant control
- ✅ Controls hydrilla, coontail, milfoil, bladderwort, and other aquatic weeds
- ✅ Helps minimize oxygen depletion from rapid vegetation die-off
- ✅ Ideal for lakes, ponds, reservoirs, and irrigation canals
- ✅ No swimming, fishing, or livestock watering restrictions after application when used according to label directions
- ✅ Trusted by professional aquatic applicators nationwide
Use Sites
Lakes, ponds, reservoirs, irrigation canals, drainage canals, freshwater impoundments, golf course ponds, ornamental ponds, and other labeled freshwater aquatic sites.Target Weeds
Duckweed, hydrilla, Eurasian watermilfoil, coontail, bladderwort, elodea, watermeal, fanwort, and other labeled aquatic weeds.Application Notes
Sonar AS works slowly and may require several weeks for complete weed control depending on water temperature, weed species, and concentration levels. Maintaining proper fluridone concentration over time is critical for optimum performance. Follow all irrigation restrictions and site-specific label directions when treating water bodies used for irrigation.Product Information
Active Ingredient: FluridoneHRAC Group: Group 12 Herbicide
Formulation: Aquatic Suspension Concentrate
Herbicide Type: Systemic Aquatic Herbicide
Manufacturer: SePRO Corporation
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4.6 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Practicality First
Color: Brown/Black, Color: Brown/Black
This is a simple, no frills watch from a well regarded brand.
It has good water resistance, good durability, and high accuracy.
If all you need is a way to tell the time that won’t fail you, buy this watch.
As it’s solar powered, it doesn’t need to be wound or have a battery replaced or charged in the foreseeable future. This longevity and low effort maintenance was the most important feature for me, and part of why I chose this over a digital watch (along with digital watches potentially being bricked from firmware).
I shouldn’t have to say this but obviously it doesn’t come out of the box charged and working - you need to leave it by a window or something for a day. After that, it will always work so long as you wear it outside every so often. The battery life is claimed to be 2 months but I’m not about to leave it in a closet for 2 months to test this. This is a newer model than the version I’d been trying to buy and it appears to have a more readable face as well as luminescent watch hands which are helpful for telling the time in the dark. It’s also nearly silent so ticking won’t be an issue.
My only complaint is the watchband. It’s a serviceable quick release band, but it’s a bit on the short side and I wanted something of higher quality so I replaced it with a Hirsch 120mm/100mm watchband that actually fits and is altogether nicer than the out of the box band.
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Reviewed in the United States on December 17, 2024
★★★★★ 5
The simplest watch there is
Color: Khaki/Black, Color: Khaki/Black
I have a 7-inch wrist and I would like to think that it's the average size (judging from the pictures I have seen from other reviews.) The watch came in from Amazon with zero charge so I charged it for about an hour using a solar watch charger and that brought it back to life. I found that you could charge a solar watch from empty to full in about 5 hours. What I like about this watch is that it fits and feels right on my wrist, is not ostentatious, not flashy, and doesn't crave for attention. You could read the time very well outdoors and even indoors. Even in the dark, the lume is laid-back, but you could still tell the time from the triangular hour markers and the hour and minute hands of the watch. I also like that it has a screw-down case back. I like to tinker with my gadgets and a screw-down case back allows me easy access to the battery when it's time to be replaced. It's also solar-powered, has a 4-month power reserve, an easy-to-operate crown, and has sapphire crystal to boot!
Fun fact: I found out recently that they made these watches in Timex's watch factory in Cebu, Philippines. By purchasing it from Amazon, it actually did a return trip back here in the Philippines!
Update after a month's use: I changed the strap with a black NATO one and it looks even better with the matte finish of the case. The charge appears to remain strong. I'll probably notice the weird erratic second hand movement (the watch does this when the charge is about to drain) after 4 months. Until then, it's not time for a recharge.
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Reviewed in the United States on January 4, 2024
★★★★★ 4
Great specs but not much else.
Color: Khaki/Black, Color: Khaki/Black
The 36mm form factor wears small. Even on my 6-7/8" wrist. It could be that I've gotten used to the more modern 40-42mm case diameters on my other watches. Or that the 12mm thickness compared to its slender diameter gives it an odd proportion that makes the watch appear a bit smaller than it already is. But either way, it does feel small on the wrist. So if you havent tried this one on in person, be prepared for that. If you have very small wrists or prefer the aesthetic of smaller watches, then this size will be great for you.
The value of this watch is difficult to pin down. In one sense, well the specs speak for themselves. And Timex has a proven history of reliabilty. But I ranked "value for money" at 3 stars, because at the end of the day you're paying $170 for a Timex. Something about that feels... weird. Timex doesnt have quite the heritage or prestige of say Citizen or Seiko - or heck even Casio for that matter. Its just a very difficult price to justify for a Timex field watch despite the great specs. I hoped in person the dial and hands would be at least slightly more impressive than they appear in the stock photos. But, no they are just as flat and blasé as in the stock photos.
If you're looking for a no-nonsense solar field watch with all the specs this watch has and in this smaller 36mm case diameter, there are very few options out there. Especially under $200 (which is why I purchased it). So in that regard, I suppose its worth it. But at this price point I would like to feel a little more proud of whats on my wrist, in terms of aesthetics and design. And I dont really get that with this watch. I even think the regular quartz version of the the Timex Expedition at around $40-50 has more wrist appeal than this watch. I do like the style of the syringe shaped hands, generally speaking. But keep in mind that a Hamilton this is not. There isnt really the level of detail put into the design to dazzle the eye. Kind of a shame really because with these specs, this watch had a lot of potential to be a classic. Havent decided if Im going to keep it or send it back.
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Reviewed in the United States on April 15, 2022
★★★★★ 5
Best watch I've ever owned in my 60yrs
Color: Brown
I purchased this 36mm Expedition North Solar Field watch about one month ago, for roughly $150, and I couldn't be more impressed. When I took it out of the box the first week of January, it had no charge...because it was in a dark box in freezing temperatures. No problem, I shined light from a regular 500 lumen rechargeable flashlight on the watch face and the second hand started to move, erratically at first, but within a minute it was moving normally. I set up the flashlight 3 inches from the watch face and left it on for 3 hours, and it has been keeping perfect time ever since. I do physical labor and this watch looks just as good as it did when I got it a month ago. The low profile keeps you from banging the watch on everything you walk past, or reach for, and the black watch face contrasting with the white numbers and near white dials, makes it very easy to tell the time at night. Also, in the past I had owned quite a few expensive watches, however, my last watch was a Timex Indiglo that I put a Shell Cordovan band on, and the real leather band that comes with this watch is more comfortable than the shell cordovan. I only own 1 watch and wear my watch continuously, only taking it off when I shower, so I feel after a month I have a pretty good read on what this watch is. It is a very tough, reliable, and comfortable watch that I will be wearing for many years to come. In my opinion, the best value for a field watch on the market.
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Reviewed in the United States on February 7, 2024
★★★★★ 1
Junk.
Color: Brown/Black
Junk watch. Arrived not working. Tried to get Timex support to help,but they put the ones on Amazon. We all know how that turned out.
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Reviewed in the United States on April 16, 2026