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Updated: 06 Apr 2026

10 Best Weed Killers Pond

#1 Best Pick
Roundup Weedkiller Concentrate, 5L

Roundup Weedkiller Concentrate, 5L

Brand: Roundup
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  • First effects seen within 12 hours
  • Rainproof after 30 minutes
  • Non-residual; not active in the soil
  • Innovative spray head with 2 spray patterns
  • Child resistant packaging
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#2 Best Value
Brunnings Ready to Use Weed Kill 1 Litre

Brunnings Ready to Use Weed Kill 1 Litre

Brand: Brunnings
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  • Controls weed and grasses in the home garden
  • Kills the entire plant including the roots
  • Non-residual replant after 7 days
  • Easy ready to use trigger pack
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#3 Budget Pick
SureFire Glyphosate 360 Herbicide Weed Killer 1 Litre, Clear

SureFire Glyphosate 360 Herbicide Weed Killer 1 Litre, Clear

Brand: SUREFIRE
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  • Glyphosate is a very effective, low toxicity weedkiller and herbicide
  • It kills pretty much everything with roots
  • It will kill most grasses, weeds, small trees and other plants
  • A water soluable herbicide for the non-slective control of most perennial and annual weeds
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#4 Top Choice
Brunnings Hose on Feed n Weed 2 Litre

Brunnings Hose on Feed n Weed 2 Litre

Brand: Brunnings
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  • Feeds lawns while selectively killing broadleaf weeds including clover, dandelion, dock and more
  • Absorbed via the leaves and kills weeds over a period of 3 to 4 weeks
  • For best results apply when weeds are actively growing
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#5 Popular Choice
Yates Zero Ultra Tough RTU Weedkiller, 750 ml, Multicolor

Yates Zero Ultra Tough RTU Weedkiller, 750 ml, Multicolor

Brand: Yates
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  • Heavy duty weed killer
  • Kills hard-to-kill weeds, roots and all
  • Rainproof in 30 minutes
  • Kills bamboo, onion weed, blackberry, lantana, oxalis, wandering trad and more
  • Pre mixed ready to use
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#6 Top Pick
Roundup Regular Weedkiller Spray, 3L

Roundup Regular Weedkiller Spray, 3L

Brand: Roundup
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  • Conveniently ready mixed
  • Rainproof in 30 minutes
  • Works within 24 hours
  • Non-residual in the soil
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#7 Top Pick
API Pond ALGAEFIX Algae Control 8-Ounce Bottle

API Pond ALGAEFIX Algae Control 8-Ounce Bottle

Brand: API
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  • Contains one (1) API POND ALGAEFIX Algae Control 8-Ounce Bottle; treats up to 2,400 U.S Gallons
  • Helps resolve algae problems and controls the formation of new algae; works fast; effectively controls most types of algae including green water (Chlorella), string and hair algae (Cladophora), blanket weed algae (Oedogonium) in ponds, koi ponds and fountains
  • This EPA-registered pond algaecide will not harm fish, plants, surrounding wildlife and pets when used as directed
  • Does not contain copper
  • Before use, make certain that the pond/fountain has vigorous aeration; thoroughly mix into pond/fountain water and disperse evenly; Repeat dose every three days until algae is controlled; dose weekly to keep pond or fountain clean and clear and to reduce maintenance
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#8 Top Pick
Roundup Advanced Concentrate Weed Killer 280 ml

Roundup Advanced Concentrate Weed Killer 280 ml

Brand: Roundup
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  • WATER SOLUBLE WEEDKILLER that provides non-selective control of many annual and perennial weeds
  • SYSTEMATIC WEEDKILLER. Kills weeds, roots and all. Not active in the soil
  • SELF-DRAINING measuring cap for no mess accurate dosing. Non-residual
  • BECAUSE IT KILLS RIGHT DOWN to the root, Roundup will eradicate almost all weeds, including deep-rooted perennials such as Pampas Grass, Bamboo and Lantana.
  • ROUNDUP kills the leaves, shoots and roots
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#9 Top Pick
API Sludge Destroyer, 2 Liter, White, (Pack of 1), 147D

API Sludge Destroyer, 2 Liter, White, (Pack of 1), 147D

Brand: API
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  • Helps eliminate pond sludge by breaking down fish waste and dead algae
  • Digests leaves and grass clippings that can fall into your pond from your yard
  • Active ingredient is 100 percent natural because your finned friends deserve nothing but the best
  • Helps reduce overall maintenance for an easy and clean pond
  • Designed for use in ornamental ponds and fountains
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#10 Top Pick
Roundup Fast Action Weedkiller Spray, 1L

Roundup Fast Action Weedkiller Spray, 1L

Brand: Roundup
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  • Conveniently ready mixed
  • Rainproof in 30 minutes
  • Works within 24 hours
  • Non-residual in the soil
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