--- product_id: 717035678 title: "Sonar RTU (Ready-to-Use) Aquatic Herbicide - 1 Quart Systemic Herbicide for Duckweed, Hydrilla and Most Difficult Aquatic Weeds, No Equipment Needed, Simply Pour in for Season Long Control" brand: "sepro" price: "€ 474.26" currency: EUR in_stock: true reviews_count: 5 category: "Se Pro" url: https://www.desertcart.be/products/717035678-sonar-rtu-ready-to-use-aquatic-herbicide-1-quart-systemic store_origin: BE region: Belgium --- # Season-long control coverage 1 quart liquid, easy pour No equipment or mixing needed Sonar RTU (Ready-to-Use) Aquatic Herbicide - 1 Quart Systemic Herbicide for Duckweed, Hydrilla and Most Difficult Aquatic Weeds, No Equipment Needed, Simply Pour in for Season Long Control **Brand:** sepro **Price:** € 474.26 **Availability:** ✅ In Stock ## Summary > 💧 Pour, relax, and reclaim your pond’s pristine glory! ## Quick Answers - **What is this?** Sonar RTU (Ready-to-Use) Aquatic Herbicide - 1 Quart Systemic Herbicide for Duckweed, Hydrilla and Most Difficult Aquatic Weeds, No Equipment Needed, Simply Pour in for Season Long Control by sepro - **How much does it cost?** € 474.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/717035678-sonar-rtu-ready-to-use-aquatic-herbicide-1-quart-systemic) ## Best For - sepro enthusiasts ## Why This Product - Trusted sepro brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **DIY Pond Perfection:** Restore your waterbody’s beauty without professional help. - • **Safe & User-Friendly:** No swimming, fishing, or drinking restrictions post-application. - • **Targeted Weed Mastery:** Eradicates duckweed, hydrilla, and toughest aquatic invaders. - • **Effortless Application:** Simply pour and forget—no gear, no hassle. - • **Powerful Season-Long Control:** Covers 1/8 acre with one quart for lasting results. ## Overview Sonar RTU is a ready-to-use aquatic herbicide designed for effortless, equipment-free application. One quart treats up to 1/8 acre of water, providing season-long control of stubborn aquatic weeds like duckweed and hydrilla. Safe for recreational use post-treatment, it empowers DIY pond owners to restore water clarity and balance with confidence. ## Description Sonar ready-to-use RTU represents an exciting new era in pond weed management for the do-it-yourselfer the innovative new RTU formulation allows anyone to make water usable for recreation, bring fish populations back into balance and restore property values. We're so sure that applications of sonar RTU conducted according to directions will control target aquatic vegetation listed on the label that we'll work with you until you see the results you expect. There's never been a better time to trust your lake or pond to sonar. Sonar RTU and duckweed many pond owners consider duckweed to be their toughest aquatic weed problem. Duckweed is a very comma on nuisance aquatic weed that is spread from pond to pond via waterfowl or other wildlife. While it is comma only mistaken for algae, duckweed is actually a tiny plant with an explosive reproductive capacity that can completely cover a pond in just a few weeks to the point that the infested waterbody resembles a golf-course green. Fortunately, no other aquatic herbicide is more effective on duckweed. Sonar provides complete, long-lasting control of duckweed and other stubborn unwanted aquatic vegetation. Review: Best product purchased on desertcart ever - My 1st review ever here. When I tell you my pond was inundated and ruined with algae and duckweed the last 5 years…this product WORKS!! Have patience with it, clean your pond while it does its thing. I can only smile while my pond is back (clear) and beautiful for this summer ☀️ Review: Works on small pond - I have a small backyard koi pond of approx. 800 gallons that got duckweed a couple of years ago from some plants I had ordered on eBay. This product is expensive but I hadn’t found a better option, so I bought a bottle and did the math to determine that I needed to add a whopping 3 ml. I double checked my work and got the same answer. So I used a syringe that had come with an inkjet refill kit, shook the bottle, sucked 3 ml out, and squirted it into the pond. It remained kind of congealed so I did mix it into the water. A week later and the duckweed turned light in color and started to die off. I skimmed most of it off and it’s obvious that it is no longer spreading. I’ll reapply in a couple of weeks per the directions but I stand amazed that 3 ml was this effective. It does not appear to be affecting my 3 koi at all. ## Features - No Mixing, No Spray Equipment, No Boat Required - Effortless Application for Any User (Simply pour directly into the waterbody) - No Drinking, Swimming, or Fishing Restrictions - Effective, and Convenient for all DIY Enthusiasts - Due to compliance with state regulations, shipments to AK, CT, HI, ME, NJ, NY, WA, and Canada are not permitted. Orders from these states will be voided. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004XWS5DU | | Brand | SePRO | | Brand Name | SePRO | | Coverage | 1 quart treats 1/8th of an acre of water for the entire season | | Customer Reviews | 4.1 out of 5 stars 412 Reviews | | Item Form | Liquid | | Item Weight | 2.17 Pounds | | Item form | Liquid | | Item weight | 2.17 Pounds | | Liquid Volume | 1 Quarts | | Liquid volume | 1 Quarts | | Manufacturer | SePRO Corporation | | Model Number | SonRTU | | Part Number | SonRTU | | UPC | 811055010933 | | Unit Count | 32.0 Milliliters | ## Product Details - **Brand:** SePRO - **Item weight:** 984 g - **Liquid volume:** 1 Quarts - **Item form:** Liquid - **UPC:** 811055010933 ## Images ![Sonar RTU (Ready-to-Use) Aquatic Herbicide - 1 Quart Systemic Herbicide for Duckweed, Hydrilla and Most Difficult Aquatic Weeds, No Equipment Needed, Simply Pour in for Season Long Control - Image 1](https://m.media-amazon.com/images/I/716pWdgNfeL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best product purchased on Amazon ever *by C***N on 10 June 2026* My 1st review ever here. When I tell you my pond was inundated and ruined with algae and duckweed the last 5 years…this product WORKS!! Have patience with it, clean your pond while it does its thing. I can only smile while my pond is back (clear) and beautiful for this summer ☀️ ### ⭐⭐⭐⭐⭐ Works on small pond *by G***G on 20 July 2024* I have a small backyard koi pond of approx. 800 gallons that got duckweed a couple of years ago from some plants I had ordered on eBay. This product is expensive but I hadn’t found a better option, so I bought a bottle and did the math to determine that I needed to add a whopping 3 ml. I double checked my work and got the same answer. So I used a syringe that had come with an inkjet refill kit, shook the bottle, sucked 3 ml out, and squirted it into the pond. It remained kind of congealed so I did mix it into the water. A week later and the duckweed turned light in color and started to die off. I skimmed most of it off and it’s obvious that it is no longer spreading. I’ll reapply in a couple of weeks per the directions but I stand amazed that 3 ml was this effective. It does not appear to be affecting my 3 koi at all. ### ⭐⭐⭐⭐⭐ Easy to apply and works as advertized. *by R***Y on 7 August 2025* This product seems expensive at first, but it is worth the price in my opinion. It is concentrated and treats a great deal of water for its size. The real advantage is that it doesn't require and special application. No spaying with droplets of a particular size and no need to be in or on the water. You apply it right out of the container. I do walk the edge of the pond to spread it out a little, but the directions say you don’t even need to do that. It is so soluble it spreads throughout the pond on its own. And it works when applied in the correct quantity and on the right schedule per the application instructions. No more algae. ## Frequently Bought Together - Sonar RTU (Ready-to-Use) Aquatic Herbicide - 1 Quart Systemic Herbicide for Duckweed, Hydrilla and Most Difficult Aquatic Weeds, No Equipment Needed, Simply Pour in for Season Long Control - Aquashade 1-Gallon Pond Treatment – EPA-Approved Blue Dye for Weed & Algae Suppression | Eco-Friendly, Non-Toxic, and Safe for Aquatic Life, Livestock, and Wildlife - Cutrine-Plus Liquid Algaecide - 1 Gallon Professional-Grade Algae Killer for Lakes & Ponds, EPA Approved to Control All Types of Algae (Planktonic, Filamentous, and Chara) --- ## 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.be/products/717035678-sonar-rtu-ready-to-use-aquatic-herbicide-1-quart-systemic](https://www.desertcart.be/products/717035678-sonar-rtu-ready-to-use-aquatic-herbicide-1-quart-systemic) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-29*