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Item #:
56869715
Airmax Knockdown Defense with Treatment Booster Plus, 2-in-1, 16 oz | Liquid Pond Algae Control, Effective Fast Acting Algaecide for Aquatic Weed
88% of respondents would recommend this to a friend
Item #:
56869715
AUD 229
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
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Imported from USA store
QTY:
Order now and get it around Thursday, September 03
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KnockDown Defense eliminates a variety of invasive weeds and algae. KnockDown works fast to eliminate algae and weeds to restore your pond or lake in just 3-5 days. KnockDown Defense is a fast-acting and long-lasting combination treatment for both algae and pond weed control.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Fast Acting
Provides rapid results in controlling algae, ensuring that ponds and lakes remain clear quickly and effectively, reducing wait times for a beautiful aquatic environment.
Versatile Use
Designed for both algae control and aquatic weed treatment, making it a comprehensive solution for maintaining healthy and clear water ecosystems.
Easy Application
Liquid formulation allows for simple and straightforward application, ensuring users can efficiently treat their ponds without complicated procedures.
Product Details
| Brand Name | Airmax |
| Manufacturer | Airmax, Inc. |
| Manufacturer Part Number | 530269 |
| Liquid Volume | 16 fluid ounces |
| Item Form | Liquid |
| Pet Type | Fish |
| Target Species | Aquatic Plants |
| Package Dimensions | 1 x 1 x 1 inches (2.5 x 2.5 x 2.5 cm); 1 pounds (450 grams) |
| Brand | Airmax |
| Number of Packs | 1 |
| Country of Origin | This item will be imported from US |
| Date First Available | July 16, 2022 |
| What is in the box | Airmax Knockdown Defense with... For more details, please check description/product details |
Who Should Buy?
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Pond Owners
Ideal for homeowners with decorative ponds looking to keep water clear and vibrant from algae and weeds.
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Aquatic Gardeners
Suitable for those maintaining aquatic plants, ensuring healthy growth by controlling unwanted algae effectively.
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Lake Enthusiasts
Great for recreational lake users wanting to maintain clear water quality for swimming and fishing activities.
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Sensitive Aquatic Life
Not suitable for ponds or lakes with delicate fish or plant species that may be harmed by chemicals.
Product Description
Airmax Knockdown Defense with Treatment Booster Plus, 2-in-1, 16 oz | Liquid Pond Algae Control, Effective Fast Acting Algaecide for Aquatic Weed Treatment in Clear Water Ponds & Lakes
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Customer Questions & Answers
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Question:
What types of algae and weeds does this product control?
Answer: KnockDown Defense eliminates floating algae, watermeal, duckweed, watermilfoil, fanwort, hydrilla, and more. -
Question:
How much of the product should I use for my pond/lake?
Answer: Use 0.75-1.5 fluid ounces of KnockDown Defense for every 1/8 acre or roughly 5,500 sq/ft. -
Question:
Where is the product not able to be shipped to?
Answer: Cannot ship to AE, AK, AP, CA, CT, DC, HI, ME, NJ, NY, PR, RI, WA, VT. -
Question:
Does this product work on Chara?
Answer: Airmax KnockDown Defense is great for floating algae, Chara, watermeal, duckweed, watermilfoil, fanwort, hydrilla, and more. -
Question:
Does this harm fish in the pond?
Answer: When used in accordance with the label, Knockdown Defense is not harmful to fish. -
Question:
How many ounces per gallon using a pump-up sprayer?
Answer: The dosage rate for this product is 2 ounces per gallon for application.
Airmax Water Treatment Editorial Review
Airmax Knockdown Defense is a powerful and effective algaecide that works quickly to clear ponds and lakes of algae and aquatic weeds. The liquid formulation is easy to use and comes with a treatment booster to make it even more effective. It is great for floating algae, chara, watermeal, duckweed, watermilfoil, fanwort, hydrilla, and more. The product is safe to use around fish and other aquatic life when used according to the label. Customers have had great success using this product to clear up their ponds and lakes, with visible results in just a few days.
Customer Reviews & Ratings
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Pros
- Effective and fast-acting
- Works on a variety of algae and aquatic weeds
- Safe for fish and other aquatic life
- Comes with a treatment booster for even better results
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
CK
Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
K
kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
OO
Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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SAO JOHN
Verified buyer
“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
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- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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AUD 229
Order now and get it around Thursday, September 03
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
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Fastest cross-border delivery
Features & Benefits
- Eliminates invasive weeds and algae
- Fast-acting, restores pond or lake in 3-5 days
- Long-lasting combination treatment
- Liquid formulation easy to measure, mix, and apply
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