Tsunami DQ Aquatic Herbicide- Quart - 37.3 Percent Diquat Dibromide – Concentrated Aquatic Weed Killer for Lakes and Ponds - Duckweed, Watermeal, Curly Leaf, Pondweed & Many More

I think this is a good value.I've used this on pond and land weeds. It has great knock down power but doesn't kill roots. However it kills any vegetation it contacts in 24-48 hours. My pond was 99% covered in Duck weed! We'd been treating with copper sulfate every 2 weeks and it still came in and took over. I spray this as soon as I see new growth. New growth slowed down and finally stopped.Need a 1 1/2 stronger solution than the instructions for aquatic. Duck weed is tough stuff. Use surfactant too. And it didn't hurt the fish. I also always use a glove and mask, etc. Better to be safe.

I've bought this before, it's a good product

I am the president of our homeowners association. I notice that Pennywort or some call it Dollar weeds were growing in one of our community ponds. It was treating to block the pond’s drain. I used this Tsunami DQ and within hours the plant began to turn yellow. By end of the day the color was tan. After one week - weeds are nearly gone. I selected this herbicide because it does not harm fish and it kills a broad variety of weeds. I am very satisfied.

Price is competitive with other sources

Worked fantastic. We have a 100x300 ft pond and it cleared it out in about a day. In 2 days all the duckweed was gone. Fantastic product

Didn’t work on cattails

Do NOT use this product if you have koi!!! We have used this product in the past with no issues to our fish. However at the end of summer last year we got some beautiful sweet koi fish. We have been having crazy amounts of duck weed so we decided to treat the pond once again and this morning I woke up to all my beautiful babies dead. I am beyond devastated and heartbroken. It says that it's safe for all aquatic life but that statement is false. I wish I have just felt with the duck weed now

I had duckweed start growing around my lake in a 3-6 feet wide strip along the edge. I ordered this stuff along with Plex Mate. The Plex Mate gets rid of the waxy coating on the leaves so the Tsunami DQ will get them. I also watched a youtube video on amounts of each to use and how to apply it. Worked great. The duckweed is gone and no dead fish. I wore gloves and a mask. Don’t inhale any of the mist. It’s best to use on calm day. Weeds were gone in a week. I used a gallon pump sprayer and had the nozzle adjusted to shoot a laser stream. Walked around lake and sprayed all the leaves. Took 3 gallons but it’s very concentrated. The leaves were brown the next day.