--- product_id: 724828051 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: "€ 170.71" currency: EUR in_stock: true reviews_count: 5 category: "Crystal Blue" url: https://www.desertcart.hr/products/724828051-tsunami-dq-aquatic-herbicide-quart-37-3-percent-diquat-dibromide store_origin: HR region: Croatia --- # Fast-acting aquatic weed control Targets broad spectrum of aquatic weeds 37.3% Diquat Dibromide concentration 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:** € 170.71 **Availability:** ✅ In Stock ## Summary > 🌊 Crush aquatic weeds fast—because your pond deserves a Tsunami of clean! ## 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?** € 170.71 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/724828051-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 - • **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. ## Overview 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. ## Description Our aquatic herbicides are effective in controlling multiple types of pond weeds. Identifying which type of weed you have will determine which of our pond weed treatments to use. Tsunami DQ is a non-selective herbicide for both submerged and floating pond weeds. Effective in controlling duckweed, water hyacinth, pondweed, slender leaf pond weed, coontail and other aquatic weeds. Tsunami DQ can be blended with other herbicides for many uses. Tsunami DQ is a diquat dibromide based herbicide. Review: 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 Review: Does the job on my lake weeds ## 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 | |---------------|-------| | 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 | ## Product Details - **Active Ingredients:** Herbicide - **Brand:** Crystal Blue - **Item form:** Liquid - **Item weight:** 907 g - **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) ## 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 ### ⭐⭐⭐⭐⭐ Review *by K***R on 12 February 2026* 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 ### ⭐⭐⭐⭐⭐ Review *by J***N on 12 February 2026* Does the job on my lake weeds ### ⭐⭐⭐⭐⭐ Review *by K***T on 21 March 2026* 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. ## 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 - Crystal Blue Plex Mate Aquatic Surfactant for Herbicides - 8 Ounces - Non-Ionic, Increase Product Coverage, Increase Product Penetration, Increase Product Effectiveness - CattPlex Pro - Aquatic Herbicide - Kills Cattails, Water Lilies, Grasses & More - Quart (32 Ounces) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/724828051-tsunami-dq-aquatic-herbicide-quart-37-3-percent-diquat-dibromide](https://www.desertcart.hr/products/724828051-tsunami-dq-aquatic-herbicide-quart-37-3-percent-diquat-dibromide) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-13*