---
product_id: 472415247
title: "KnockDown Defense"
brand: "airmax"
price: "737.90 DT"
currency: TND
in_stock: null
reviews_count: 8
category: "Airmax"
url: https://www.desertcart.tn/products/472415247-knockdown-defense
store_origin: TN
region: Tunisia
---

# Fast-acting in 3-5 days Controls 7+ invasive aquatic plants Easy liquid formulation for precise dosing KnockDown Defense

**Brand:** airmax
**Price:** 737.90 DT
**Availability:** ❌ Out of Stock

## Summary

> 🌊 Clear Water, Zero Compromise: Pond Perfection in a Bottle

## Quick Answers

- **What is this?** KnockDown Defense by airmax
- **How much does it cost?** 737.90 DT with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/472415247-knockdown-defense)

## 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

- • **Multi-Target Power:** Eradicates floating & submerged invasive plants like duckweed, hydrilla, and milfoil.
- • **Rapid Clarity Boost:** Clears algae & weeds in just days, so your pond looks pristine fast.
- • **Versatile Water Use:** Safe for ponds, lakes, and slow-moving waters—perfect for your outdoor oasis.
- • **Long-Lasting Defense:** Keeps your pond clear and healthy with a formula designed for sustained action.
- • **Precision Liquid Control:** Simple to measure and apply with tank sprayers for professional-grade results.

## Overview

Airmax Knockdown Defense is a 16 fl oz fast-acting liquid algaecide and aquatic weed treatment designed to eliminate a broad spectrum of invasive pond and lake plants within 3-5 days. Its easy-to-use liquid formula ensures precise application, delivering long-lasting clarity and health to ponds, lakes, and slow-moving waters.

## Description

desertcart.com : Airmax Knockdown Defense 2-in-1 Liquid Pond Algae Control, Effective & Fast Acting Algaecide, Aquatic Weed Treatment for Clear Water in Ponds & Lakes, Liquid Formulation for Easy Use, 16 fl oz : Patio, Lawn & Garden

Review: Pond Water Clearifier - Makes the water pretty. Doesn't help with weed control.
Review: Incredibly effective for duckweed. Killed all vegetation. - Absolutely blown away with how effective this product is. I used a single application as directed and it removed 100% of the duckweed in about 2 weeks. I planned a second treatment, but patience was all that was needed. Incredible product, wish I found it sooner. Also this pond is used for irrigation of the lawn and beds. I waited 5 days as per instructions before using for irrigation and had not issues with my lawn or plants. After pic shown first.

## 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 | #58,217 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #107 in Water Garden & Pond Treatment |
| Brand Name | Airmax |
| Color | KnockDown Defense |
| Customer Reviews | 4.1 4.1 out of 5 stars (213) |
| Date First Available | June 13, 2022 |
| Date First Available  | June 13, 2022 |
| Directions | To use KnockDown Defense, mix the treatment in a tank sprayer with clean water and a surfactant. The quantity to use is 0.75-1.5 fluid ounces for every 1/8 acre or roughly 5,500 sq/ft. When treating floating plants and algae, evenly spray rain-size droplets over the treatment area. When treating submerged weeds and algae, submerge the spray nozzle several inches into the water. |
| Item Dimensions LxWxH | 5 x 2 x 9 inches |
| Item Package Dimensions L x W x H | 8.82 x 4.84 x 1.69 inches |
| Item Weight | 1.43 pounds |
| Manufacturer | Airmax, Inc. |
| Manufacturer  | Airmax, Inc. |
| Product Dimensions  | 5 x 2 x 9 inches; 1.43 Pounds |
| Size | 16 oz |

## Product Details

- **Brand:** Airmax
- **Item Form:** Liquid
- **Liquid Volume:** 16 Fluid Ounces
- **Manufacturer:** Airmax, Inc.
- **UPC:** 810089840295

## Images

![KnockDown Defense - Image 1](https://m.media-amazon.com/images/I/51OUdezWiuL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Pond Water Clearifier
*by B***. on November 23, 2025*

Makes the water pretty. Doesn't help with weed control.

### ⭐⭐⭐⭐⭐ Incredibly effective for duckweed. Killed all vegetation.
*by A***R on July 20, 2025*

Absolutely blown away with how effective this product is. I used a single application as directed and it removed 100% of the duckweed in about 2 weeks. I planned a second treatment, but patience was all that was needed. Incredible product, wish I found it sooner. Also this pond is used for irrigation of the lawn and beds. I waited 5 days as per instructions before using for irrigation and had not issues with my lawn or plants. After pic shown first.

### ⭐⭐⭐⭐ IT WORKS!
*by T***E on May 19, 2024*

I am not an expert on plants or weeds that invade ponds. I am an expert on knowing products that work! This product works! My pond was literally taken over by one invader that was not welcome! My pond is about an acre and is stocked with fish so I had to be careful. The weeds started dying in two days and there were no floating fish! BINGO!! The application is easy you simply walk around your pond and throw granules in your water!

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-02-08*