Sonar RTU (Ready-to-Use) Aquatic Herbicide - 1 Quart Systemic Herbicide for Duckweed, Hydrilla and Most Difficult Aquatic Weeds, No Equipment Needed, Simply Pour in for Season Long Control

Hurt weeds after 1st application.

I have a small backyard koi pond of approx. 800 gallons that got duckweed a couple of years ago from some plants I had ordered on eBay. This product is expensive but I hadn’t found a better option, so I bought a bottle and did the math to determine that I needed to add a whopping 3 ml. I double checked my work and got the same answer. So I used a syringe that had come with an inkjet refill kit, shook the bottle, sucked 3 ml out, and squirted it into the pond. It remained kind of congealed so I did mix it into the water.A week later and the duckweed turned light in color and started to die off. I skimmed most of it off and it’s obvious that it is no longer spreading. I’ll reapply in a couple of weeks per the directions but I stand amazed that 3 ml was this effective. It does not appear to be affecting my 3 koi at all.

I have ordered this product more than one time, as every time I want to eliminate any duck weed in my pond right away before it gets out of hand. My pond was covered with duck weed, and after much online research, I decided to try this. It's easy to put in the pond, no need for a sprayer or dispersing it while in a boat. It works fast, and I'm pleased with the results. Non toxic to plants and animals.

3 weeks no results ! Don't waste your money! Duck weed acted like this stuff was fertilizer and took over my 1acre pond.

My pond has had a huge duckweed problem for over 10 years. Nothing would get rid of it and I tried all kinds of herbicides and treatment plans that cost a lot of money. I used this last fall in November when the duckweed was still like a mat on my pond. It slowly killed it off and then this Spring, the duckweed did not return until July. It usually shows up in early May. My pond has been pretty clear up until this past couple of weeks (July). I have ordered more and plan to treat it again. This was recommended by someone who also had a duckweek problem on their pond. He said he treated it once and it never came back. I am hopeful that I will be able to finally eliminate the duckweed on my pond as this is the only thing that has gotten rid of it.

One acre pond, that I can’t keep the fish alive through the winter. Problem seems to be too much vegetation going into winter. Per instructions, two containers at first, and then one per month for the next two months. Almost $500. The vegetation browned fairly quickly. I hope enough vegetation died before the ice came. Fingers crossed.

OMG! Awesome stuff. I was not sure about this at first because of so many bad reviews so I called the company. Because I was desperate! I’ve tried everything for years.Sorry about the first picture I rarely had a picture of it because it was so ugly. They said My pond meet the requirements for it to work. No stream coming into it or any additional water coming in that would dilute it or let it overflow out. I think this stuff floats somehow 🤷🏻‍♀️We added it early April before it got to a thick carpet on the pond but the duck weed still covered the complete pond. The second picture is about 35 days after the first dose. My next dose to be added is may 4th. And then a third still to be added. So you see it works!! After only a week I could see the duck weed turning grayish color so I had high hopes. I ordered only one bottle And did exactly what they say to do. Squeeze 1/2 the stuff in one spot! How easy is that!? Call them, they know what to do for you.I had to google the company to get the number.They said they are the ones that also sell on Amazon.I asked because I believe there’s copy cats out there.Then got it on Amazon because it was cheaper and free shipping for me.How this helps.It’s now Almost September and it’s still working. Although I see some coming back but it’s turning gray also, so I may do another round this fall. We have a lot of cranes that bring more duckweed so I’m sure they’re the problem

Following the directions and applied to our 1/2 acre pond early in the spring. It's good for about 8 weeks before you need to test again. This is the third year of using the product. Controls all the nuisance lake weeds.