---
product_id: 49789760
title: "Diquat Aquatic Herbicide (2.5 Gallons)"
brand: "alligare"
price: "¥80291"
currency: JPY
in_stock: true
reviews_count: 5
category: "Alligare"
url: https://www.desertcart.jp/products/49789760-diquat-aquatic-herbicide-2-5-gallons
store_origin: JP
region: Japan
---

# Kills aquatic & terrestrial weeds within 1 hour Safe for fish in treated waters 2.5 Gallons liquid volume Diquat Aquatic Herbicide (2.5 Gallons)

**Brand:** alligare
**Price:** ¥80291
**Availability:** ✅ In Stock

## Summary

> 🌿 Clear waters, zero weeds, total peace of mind.

## Quick Answers

- **What is this?** Diquat Aquatic Herbicide (2.5 Gallons) by alligare
- **How much does it cost?** ¥80291 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/49789760-diquat-aquatic-herbicide-2-5-gallons)

## Best For

- alligare enthusiasts

## Why This Product

- Trusted alligare brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Action Power:** Eradicates aquatic and terrestrial weeds in just 60 minutes, so your outdoor space stays pristine without the wait.
- • **Proven Track Record:** Trusted by pond owners and gardeners alike, with visible results in days and sustained clarity season after season.
- • **Fish-Friendly Formula:** Effectively clears weeds while preserving your pond’s ecosystem—no harm to fish, just crystal-clear water.
- • **Bulk 2.5 Gallon Supply:** Generous volume lets you treat large ponds or multiple areas, ensuring long-lasting control and value.
- • **Dual-Purpose Versatility:** Not just for ponds—also annihilates stubborn land weeds, making it your all-in-one weed warrior.

## Overview

Diquat Aquatic Herbicide is a powerful liquid herbicide designed to rapidly eliminate aquatic weeds like duckweed and coonweed, as well as terrestrial weeds, while being safe for fish. Supplied in a 2.5-gallon container, it offers a professional-grade solution for maintaining clear, healthy ponds and gardens with visible results often within hours.

## Description

Diquat Aquatic Herbicide

Review: This stuff really works!! - This stuff is amazing. I have a lake in my backyard and every spring It starts to grow aquatic weeds. Also with the rains in April and May, it makes the water just kind of cloudy and yuck so I mix up a batch of this and it kills the aquatic leaves, but it’s safe for the fish. I also discovered that this stuff is lethal for any sort of regular weed. I was using regular weed killer and it would take a week or so to actually kill the weeds but never really just knock them out. So when I have extra of this stuff from the Lake. I put it on any weed that I want to annihilate. It kills them within an hour or so. I like that because they stay dead. They do not come back from this stuff. It is a little expensive to use as a total weed killer and you do need to have a soap or something so that it adheres to the weeds and you add it in your mixture when you’re using this... You use water, this stuff and I forget the name of what the soap thing is supposed to be called and you mix those three things together and you have your mixture. I get two batches out of each of these bottles. That requires two bottles of the soap stuff. I mix those in a sprayer and I’m good to go! This is good stuff!
Review: works well on duckweed and coonweed - I started using diquat in 2023 my 1 acre pond was 100% covered with duckweed and coon weed coming from the bottom I started treating it in June the results were visible within 2 days my pond has trees on all 4 sides so after reading everything I could find on duckweed I knew this was going to be a long process I would treat my pond every two weeks and since there are no fish I more or less sterilized it by fall it was 95% clear of duckweed and coon weed but since duckweed sinks to the bottom in the winter I knew that some would come back and in 2024 it did but only a small amount I sprayed it in May 2024 in killed most of it but I will tell you no matter what the experts say if your pond has trees around it is the leaves that fall in your pond is where duckweed gets what it get what it needs to grow I'm not sure if you can completely kill it 100% but I have a clear pond now but after going through what I did it was worth the time and money to get a beautiful pond back I had used several different types of products but with duck weed don't waste your money on anything but diquat they do make a product that will clear up the muck on the bottom but it is extremely expensive and has to be used yearly and new leaves fall in every year I decided diquat was my best option.

## Features

- Diquat Aquatic Herbicide

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007H2IKHE |
| Active Ingredients | Diquat dibromide, Herbicide |
| Best Sellers Rank | #19,721 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #393 in Water Garden & Pond Treatment |
| Brand | ALLIGARE |
| Date First Available | March 5, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 2 pounds |
| Liquid Volume | 2.5 Gallons |
| Manufacturer | Alligare |
| Package Dimensions | 14 x 8.5 x 6 inches |
| Unit Count | 320 Fluid Ounces |

## Product Details

- **Active Ingredients:** Diquat dibromide, Herbicide
- **Brand:** ALLIGARE
- **Item Form:** Liquid
- **Item Weight:** 2 Pounds
- **Liquid Volume:** 2.5 Gallons

## Images

![Diquat Aquatic Herbicide (2.5 Gallons) - Image 1](https://m.media-amazon.com/images/I/21o0M1G9qyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ This stuff really works!!
*by E***9 on May 15, 2025*

This stuff is amazing. I have a lake in my backyard and every spring It starts to grow aquatic weeds. Also with the rains in April and May, it makes the water just kind of cloudy and yuck so I mix up a batch of this and it kills the aquatic leaves, but it’s safe for the fish. I also discovered that this stuff is lethal for any sort of regular weed. I was using regular weed killer and it would take a week or so to actually kill the weeds but never really just knock them out. So when I have extra of this stuff from the Lake. I put it on any weed that I want to annihilate. It kills them within an hour or so. I like that because they stay dead. They do not come back from this stuff. It is a little expensive to use as a total weed killer and you do need to have a soap or something so that it adheres to the weeds and you add it in your mixture when you’re using this... You use water, this stuff and I forget the name of what the soap thing is supposed to be called and you mix those three things together and you have your mixture. I get two batches out of each of these bottles. That requires two bottles of the soap stuff. I mix those in a sprayer and I’m good to go! This is good stuff!

### ⭐⭐⭐⭐⭐ works well on duckweed and coonweed
*by T***G on June 15, 2024*

I started using diquat in 2023 my 1 acre pond was 100% covered with duckweed and coon weed coming from the bottom I started treating it in June the results were visible within 2 days my pond has trees on all 4 sides so after reading everything I could find on duckweed I knew this was going to be a long process I would treat my pond every two weeks and since there are no fish I more or less sterilized it by fall it was 95% clear of duckweed and coon weed but since duckweed sinks to the bottom in the winter I knew that some would come back and in 2024 it did but only a small amount I sprayed it in May 2024 in killed most of it but I will tell you no matter what the experts say if your pond has trees around it is the leaves that fall in your pond is where duckweed gets what it get what it needs to grow I'm not sure if you can completely kill it 100% but I have a clear pond now but after going through what I did it was worth the time and money to get a beautiful pond back I had used several different types of products but with duck weed don't waste your money on anything but diquat they do make a product that will clear up the muck on the bottom but it is extremely expensive and has to be used yearly and new leaves fall in every year I decided diquat was my best option.

### ⭐⭐⭐⭐⭐ Effective for both lake weed control and ground plants
*by W***E on July 13, 2020*

I've been using this chemical to control lake weeks for about 10 years. Here is what I've learned. This company (Lawn & Pest Control Supply) packs the product properly - with a tape seal and plastic bag - so that it can be easily unpacked. Do not purchase from NuFarm, they glue the lids closed with sealant so that the lids are impossible to remove without making a mess. Safety - this is super concentrated - wear gloves and SAFETY GLASSES - do not get it on your skin. I always pressure/leak test my spray rig before adding this chemical. Lake application - We use this to control underwater weeds in about 25 acres of a 40 acre lake. For preventative maintenance we apply a gallon every 3 (water temperature 85+) to 5 weeks (water temperature 55 to 65) using a 25 gallon sprayer to inject 3' below the water (in the sunlight zone). Never use more than 2 gallons (don't treat your entire lake at once!) because all the weeds will die and float making a big mess and killing your fish when the weeds decompose (taking all the oxygen from the water). I dilute 20 gallons of water to 1 gallon of water, injected at 4 gpm (2 down tubes) driving the boat at idle and holding a beer in the hand does the trick. Weeds need to be green/actively growing and in the sunlight zone (about 3' below the water) for this to work. Adding a gallon of copper improves the efficacy and makes the water more clear, although this year I am experimenting with coarse copper granules sprinkled in the root zones which seems to retard growth pretty well but does not kill unless applied at about a pound per 5 square feet. Do not apply below 50 degree water temp, the weeds must be growing and get sunlight for this product to work. Maximum efficacy by applying with at least 4 hours of sunlight after application and do not stir up the mud or all the chemical will bind with the mud instead of the leaves. Our lake is spring fed so it would be too expensive to dye. Using the diquat/copper combination we are able to keep the weeds under control and also maintain a healthy habitat. I also add a little bit of blue pond dye to help me see where I have applied. TIP - make sure to rinse your spray equipment with lots of clear water after use, this chemical is highly corrosive. Also it does stain fiberglass and carpet. I have also tried this chemical for killing weeds and grass at my house, at ~2oz per quart and it killed everything. Again be sure to spray when sun is forecast, this chemical works by interrupting the photosynthesis.

## Frequently Bought Together

- Alligare Diquat-Compare to Reward (2.5 gallon)
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- Ranger Pro 41% Glyphosate 5 Gallons 2 x 2.5/Gal Jug Systemic Herbicide Same as Round Up Pro

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-29*