Is Tsunami safe to use with fish?

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.

How often should I use Tsunami DQ?

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.

How do I apply this product?

Tsunami DQ is a contact herbicide. Best results by spraying over top of the growth you are treating.

How much product do I use?

2-8 quarts per surface acre depending on infestation & type of weed for aquatics.

When is the best time to treat my pond weeds?

Pond weeds should be treated when they are actively growing and water temperatures are above 60F.

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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

Product ID: 724828051

Details

Active Ingredients
Herbicide
Brand
Crystal Blue
Item form
Liquid
Item weight
907 g
Liquid volume
32 Fluid

⚡Fast-acting aquatic weed control

🌿Targets broad spectrum of aquatic weeds

💧37.3% Diquat Dibromide concentration

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Description

🌊 Crush aquatic weeds fast—because your pond deserves a Tsunami of clean!

BROAD SPECTRUM CONTROL - Effectively tackles duckweed, watermeal, curly leaf, pondweed, and more, giving you comprehensive aquatic weed management.
TRUSTED BY PROFESSIONALS - Backed by a 4.4-star rating from over 850 users, join the community of pond and lake managers who rely on Tsunami DQ.
ECO CONSCIOUS WATER SAFETY - Formulated to protect fish and wildlife, maintaining your pond’s natural ecosystem while eliminating unwanted vegetation.
PRECISION APPLICATION READY - Concentrated liquid formula designed for easy mixing and targeted spraying, ensuring efficient coverage and minimal waste.
RAPID AQUATIC WEED ERADICATION - Experience visible results overnight with a powerful, fast-acting formula that conquers submerged, floating, and emerged weeds.

Tsunami DQ Aquatic Herbicide is a concentrated 37.3% diquat dibromide liquid formula designed for rapid and effective control of a wide range of aquatic weeds in lakes and ponds. Safe for fish and wildlife when used as directed, it offers easy application and trusted performance, making it a top choice for maintaining healthy, weed-free water environments.

Specifications

ASIN	B004KTILEO
Active Ingredients	Herbicide
Brand Name	Crystal Blue
Coverage	2-8 quarts per surface acre
Customer Reviews	4.4 4.4 out of 5 stars (851)
Item Form	Liquid
Item Type Name	Tsunami DQ Aquatic Herbicide - 37.3 Percent Diquat Dibromide - 1 Quart
Item Weight	2 Pounds
Liquid Volume	32 Fluid Ounces
Manufacturer	Crystal Blue
Model Number	137
Part Number	137
UPC	768980001379 768980118008
Unit Count	32.0 Milliliters

Reviews

K**R

This product worked great in our 2 acre pond. Poured a small amount on all side of the pond. Next morning it was completely blue. Helps keep the unwanted grass down

12.02.2026

J**N

Does the job on my lake weeds

12.02.2026

K**T

This kills everything. I sprayed a light mist and the next few days slowly but obviously everything I sprayed died. Be careful to not hit any vegetation you don't want dead.

21.03.2026

R**Z

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

11.07.2025

E**N

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.

25.12.2025

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163389CFA

Duties & taxes included

In stock

Sold byAmazon Cote D' IvoireDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cote D' Ivoire.

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