---
product_id: 24439694
title: "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"
brand: "crystal blue"
price: "$120.25"
currency: USD
in_stock: true
reviews_count: 8
category: "Crystal Blue"
url: https://www.desertcart.us/products/24439694-tsunami-dq-aquatic-herbicide-quart-37-3-percent-diquat-dibromide
store_origin: US
region: United States of America
---

# Fast-acting aquatic weed control 37.3% Diquat Dibromide Concentrate Safe for fish & wildlife 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

**Brand:** crystal blue
**Price:** $120.25
**Availability:** ✅ In Stock

## Summary

> 🌊 Clear waters, zero weeds—own your pond’s pristine vibe!

## Quick Answers

- **What is this?** 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 by crystal blue
- **How much does it cost?** $120.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/24439694-tsunami-dq-aquatic-herbicide-quart-37-3-percent-diquat-dibromide)

## Best For

- crystal blue enthusiasts

## Why This Product

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

## Key Features

- • **Long-Lasting Impact:** Effective coverage that keeps your water clear and healthy for months.
- • **Eco-Conscious Formula:** Protects your pond’s ecosystem while eradicating invasive plants safely.
- • **Effortless Application:** Ready-to-mix concentrate designed for easy, targeted spraying—no guesswork needed.
- • **Rapid Results, Less Wait:** See visible weed elimination fast—no more waiting weeks to reclaim your water.
- • **Precision Aquatic Control:** Targets duckweed, watermeal, curly leaf, pondweed & more with pinpoint accuracy.

## Overview

Tsunami DQ is a concentrated aquatic herbicide with 37.3% Diquat Dibromide, engineered for fast, effective control of a broad spectrum of aquatic weeds and algae in lakes and ponds. Safe for fish and wildlife when used as directed, it offers an easy-to-apply, eco-friendly solution that restores and maintains healthy water environments.

## Description

desertcart.com : 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 : Algaecide Water Treatments : Patio, Lawn & Garden

Review: Good stuff and best price for it is desertcart. - Stuff works and best price for it is desertcart. You have to reapply it im a month or two if thick moss on top but worth it cause it really works. Saved our pond from suffocation.
Review: Very efective. - This stuff is a little pricey, but you don't need much per batch so it will go a long way. I used it on dry ground. Works very well. The directions say to completely cover the target and that is what I did. Any plants not covered completely will still survive.

## Features

- This product is not for sale in the following states: AZ, CA, CT, ME, MN, NH, NJ, NY, OR, VT, WA
- Effective Aquatic Weed Control: Tsunami DQ is a Diquat based Aquatic Herbicide that is specifically formulated to target and control a wide range of unwanted aquatic plants and algae, ensuring a cleaner, healthier water environment.
- Fast-Acting Formula: This powerful herbicide delivers rapid results, quickly killing submerged, floating, and emerged aquatic weeds in ponds, lakes, and other water bodies.
- Safe for Water Use: When used as directed, Diquat is safe for fish, wildlife, and other aquatic organisms, making it an ideal solution for maintaining water balance without harming the ecosystem.
- Easy-to-Apply: Comes in a ready-to-mix concentrate that is simple to apply with sprayers, allowing for targeted treatment of problem areas.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Active Ingredients | Herbicide |
| Best Sellers Rank | #34,392 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #183 in Weed Killers |
| Brand | Crystal Blue |
| Customer Reviews | 4.3 out of 5 stars 857 Reviews |
| Item Form | Liquid |
| Item Weight | 2 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| UPC | 768980001379 768980118008 |

## Product Details

- **Active Ingredients:** Herbicide
- **Brand:** Crystal Blue
- **Item Form:** Liquid
- **Item Weight:** 2 Pounds
- **Liquid Volume:** 32 Fluid Ounces

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/81p0LbqpqsL.jpg)
![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 - Image 2](https://m.media-amazon.com/images/I/81H5KjinLvL.jpg)
![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 - Image 3](https://m.media-amazon.com/images/I/81OnP4ehH3L.jpg)
![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 - Image 4](https://m.media-amazon.com/images/I/91Wtqi6C2qL.jpg)
![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 - Image 5](https://m.media-amazon.com/images/I/911nxgIB8uL.jpg)

## Questions & Answers

**Q: Is Tsunami safe to use with fish?**
A: This product is safe when used according to label directions. When treating excessive pond growth, it is always important to treat in sections to avoid rapid oxygen depletion.

**Q: How often should I use Tsunami DQ?**
A: Tsunami DQ should be used for pond weeds. Wait 14 days between applications and only treat a 1/2 or 1/3 of the pond at a time to recover oxygen levels.

**Q: How do I apply this product?**
A: Tsunami DQ is a contact herbicide. Best results by spraying over top of the growth you are treating.

**Q: How much product do I use?**
A: 2-8 quarts per surface acre depending on infestation & type of weed for aquatics.

**Q: When is the best time to treat my pond weeds?**
A: Pond weeds should be treated when they are actively growing and water temperatures are above 60F.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good stuff and best price for it is amazon.
*by E***N on December 25, 2025*

Stuff works and best price for it is Amazon. You have to reapply it im a month or two if thick moss on top but worth it cause it really works. Saved our pond from suffocation.

### ⭐⭐⭐⭐⭐ Very efective.
*by B***R on August 22, 2025*

This stuff is a little pricey, but you don't need much per batch so it will go a long way. I used it on dry ground. Works very well. The directions say to completely cover the target and that is what I did. Any plants not covered completely will still survive.

### ⭐⭐⭐⭐ Extremely overgrown weeds
*by R***Z on July 11, 2025*

Seems to kill surface weeds well, have not noticed any subsurface weeds dieing , weeds were heavy, going to spray again

## Frequently Bought Together

- 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
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-12*