--- product_id: 472415247 title: "Airmax Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz" brand: "airmax" price: "27156 kr" currency: ISK in_stock: true category: "Airmax" url: https://www.desertcart.is/products/472415247-airmax-knockdown-defense-2-in-1-pond-algae-and-weed store_origin: IS region: Iceland --- # Fast-acting in 3-5 days Targets 7+ invasive aquatic plants Liquid formula for easy application Airmax Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz **Brand:** airmax **Price:** 27156 kr **Availability:** βœ… In Stock ## Summary > 🌊 KnockDown Defense: Because your pond deserves a glow-up! ## Quick Answers - **What is this?** Airmax Knockdown Defense 2-in-1 Pond Algae & Weed Control, 16 fl oz by airmax - **How much does it cost?** 27156 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/472415247-airmax-knockdown-defense-2-in-1-pond-algae-and-weed) ## 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 - β€’ **Versatile Use:** Perfect for ponds, lakes, canals, and slow-moving waters. - β€’ **Rapid Restoration:** Clear your pond or lake in just days, not weeks. - β€’ **Dual-Action Formula:** Simultaneously eliminates algae and invasive weeds for total water clarity. - β€’ **Long-Lasting Control:** Keeps your aquatic environment pristine with extended protection. - β€’ **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 ## 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 | | ASIN | B0B3Y5Z1S8 | | Best Sellers Rank | #12,650 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #52 in Water Garden & Pond Treatment | | Brand Name | Airmax | | Customer Reviews | 4.5 4.5 out of 5 stars (72) | | Date First Available | June 13, 2022 | | Item Form | Liquid | | Item Weight | 0.65 kg | | Liquid Volume | 16 fluid ounces | | Manufacturer | Airmax, Inc. | | Manufacturer | Airmax, Inc. | | Manufacturer Part Number | 530268 | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Amphibian, Fish, Reptile | | Product Dimensions | 5 x 2 x 9 inches; 1.43 pounds | | 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 ![Airmax 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. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/472415247-airmax-knockdown-defense-2-in-1-pond-algae-and-weed](https://www.desertcart.is/products/472415247-airmax-knockdown-defense-2-in-1-pond-algae-and-weed) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-09-02*