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, 16 oz with Treatment Booster Price: $109.99 (as of 02/01/2024 23:54 PST- Details)

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.