--- product_id: 472415247 title: "Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz" brand: "airmax" price: "56.90 OMR" currency: OMR in_stock: true reviews_count: 8 category: "Airmax" url: https://www.desertcart.com.om/products/472415247-knockdown-defense-2-in-1-pond-algae-and-weed-control store_origin: OM region: Oman --- # Fast-acting in 3-5 days Targets 7+ invasive aquatic plants Liquid formula for easy application Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz **Brand:** airmax **Price:** 56.90 OMR **Availability:** ✅ In Stock ## Summary > 🌊 KnockDown Defense: Because your pond deserves a glow-up! ## Quick Answers - **What is this?** Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz by airmax - **How much does it cost?** 56.90 OMR with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/472415247-knockdown-defense-2-in-1-pond-algae-and-weed-control) ## Best For - airmax enthusiasts ## Why This Product - Trusted airmax brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Use:** Perfect for ponds, lakes, canals, and slow-moving waters. - • **Rapid Restoration:** Clear your pond or lake in just days, not weeks. - • **Dual-Action Formula:** Simultaneously eliminates algae and invasive weeds for total water clarity. - • **Long-Lasting Control:** Keeps your aquatic environment pristine with extended protection. - • **Precision Application:** Easy-to-measure liquid form ensures no waste, just results. ## Overview Airmax Knockdown Defense is a powerful 2-in-1 liquid treatment designed to rapidly eliminate a broad spectrum of invasive aquatic weeds and algae in ponds, lakes, and slow-moving waters. Delivering visible results within 3-5 days, its easy-to-use formula ensures precise application and long-lasting control, making it the go-to solution for maintaining crystal-clear, healthy water environments. ## Description desertcart.com : Airmax Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz | Fast-acting algaecide and aquatic weed treatment helps clear ponds and lakes with an easy-to-use liquid formula : Patio, Lawn & Garden Review: Highly recommend - This stuff was amazing! We’ve had stubbornly pads in our pond for two years. We use this along with Airmax defense, and they are finally dying off and will be able to remove them soon. We’ll definitely use in the spring to keep others from growing. Review: Aquatic weed killer and algae - This is really good stuff, but definitely do not make it too strong. It will even kill grass around. The pond if made to strong a bit pricey though ## Features - Powerful formula: KnockDown Defense eliminates a variety of invasive weeds and algae including: floating algae, watermeal, duckweed, watermilfoil, fanwort, hydrilla, and more. KnockDown Defense is effective in ponds, lakes, and slow moving or inactive water such as canals. - Fast results: Whether you’re dealing with floating algae or submerged aquatic plants, KnockDown works fast to eliminate algae and weeds to restore your pond or lake in 3-5 days. - Liquid formulation: KnockDown Defense is a liquid algae control and aquatic herbicide that is easy to measure, mix, and apply. For best results, apply aquatic weed control treatment with a surfactant and a tank sprayer. - Innovative solution: KnockDown Defense is a fast-acting and long-lasting combination treatment for both algae and pond weed control. Developed to be effective on even the toughest invasive lake weeds and algae. - For ponds & lakes: KnockDown Defense provides fast-acting, long-lasting pond weed control. Use 0.75-1.5 fluid ounces of KnockDown Defense for every 1/8 acre or roughly 5,500 sq/ft. Use as directed. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B3Y5Z1S8 | | Best Sellers Rank | #15,611 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #55 in Water Garden & Pond Treatment | | Brand | Airmax | | Brand Name | Airmax | | Customer Reviews | 4.6 out of 5 stars 71 Reviews | | Item Form | Liquid | | Item Weight | 0.65 kg | | Liquid Volume | 16 fluid ounces | | Manufacturer | Airmax, Inc. | | Manufacturer Part Number | 530268 | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Amphibian, Fish, Reptile | | Target Species | Aquatic Plants | | UPC | 810089840295 | | Unit Count | 16 Fluid Ounces | ## Product Details - **Brand:** Airmax - **Item Form:** Liquid - **Item Weight:** 0.65 kg - **Liquid Volume:** 16 fluid ounces - **Number of Packs:** 1 ## Images ![Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz - Image 1](https://m.media-amazon.com/images/I/51OUdezWiuL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Highly recommend *by J***H on July 10, 2026* This stuff was amazing! We’ve had stubbornly pads in our pond for two years. We use this along with Airmax defense, and they are finally dying off and will be able to remove them soon. We’ll definitely use in the spring to keep others from growing. ### ⭐⭐⭐⭐⭐ Aquatic weed killer and algae *by G***T on February 23, 2026* This is really good stuff, but definitely do not make it too strong. It will even kill grass around. The pond if made to strong a bit pricey though ### ⭐⭐⭐⭐⭐ A game vhanger in pond management *by C***H on April 23, 2026* Although it is quite pricey, it’s well worth the money. We have used for several years and it is very fast acting and easy to administer. --- ## 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.com.om/products/472415247-knockdown-defense-2-in-1-pond-algae-and-weed-control](https://www.desertcart.com.om/products/472415247-knockdown-defense-2-in-1-pond-algae-and-weed-control) --- *Product available on Desertcart Oman* *Store origin: OM* *Last updated: 2026-08-31*