DOWNLOAD THE APP
Customer Services
Copyright © 2025 Desertcart Holdings Limited
DOWNLOAD THE APP
🌊 Clear Water, Zero Compromise: Pond Perfection in a Bottle
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.
| 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 |
B**.
Pond Water Clearifier
Makes the water pretty. Doesn't help with weed control.
A**R
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.
T**E
IT WORKS!
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!
S**E
Does not work. Save your money
It has been over a week and nothing is dying at all. I used 4x the recommended amount and nothing. Use copper sulfate! It is half the cost and kills everything in a few days. I only tried this because it was supposed to kill everything and last a few months. What a waste of time and money :(
R**N
Worked as described
Killed weeds as described
A**R
Best pond product!
Why did you pick this product vs others?: I have had a pond for the last 12 years! Best product out there! 90 degrees and pond looks great!! I have spent so much money over the years. This is not cheap but at least it works!
A**R
Great product
I had an issue with aquatic growth in a farm pond. I ordered just product and applied it as directed and it worked amazing. The growth is on the control. Fish ,frogs and turtles are happy. And the water quality is clear. Thank you for an amazing product.
N**Y
Did the job in a short time
Cleared our lake of weeds
Trustpilot
2 weeks ago
2 days ago