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Best Natural Algaecides

From leading brands and best sellers available on the web.

Winner

API

API Pond ALGAEFIX Algae Control 1-Gallon Bottle

10.0

score

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API

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

8.8

score

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SPLOSHT

Splosht Large Fishpond/Waterfeature Pack - Dissolvable Sachets - No Measuring. Reduces Algae and Sludge Naturally - Safe for Fish and Aquatic Animals - Treats 150-13,600 litres (Large Pond)

7.9

score

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API

API Pond-Zyme Sludge Destroyer Pond Cleaner with Natural Pond Bacteria and Barley, 8oz Container

7.6

score

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Sanco Industries

Bird Bath & Fountain Maintenance - (8 Ounces) - Fast-Acting Enzyme-Based Formula Will Extend The Life of Your Water Feature, Aid in Maintaining a Balanced Ecosystem - Safe for All Birds & Animals

7.6

score

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Microzyme

Microzyme Muck Fighter Pond Treatment Block | Lasts 30 days | Natural Pond Bacteria & Sludge Decomposing Enzymes | Water Clearing Odor Eliminating Microbes | Safe for Fish, Pets, & Recreation (4-pack)

7.3

score

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MICROBE-LIFT

MICROBE-LIFT Bird Bath Clear Two-in-One Water Cleaner and Surface Treatment for Outdoor Birdbaths and Fountains, Safe for Birds, Fish, and Frogs (Birdbath Clear 4-Ounce)

7.3

score

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HTH

HTH 67067 Swimming Pool Care Clarifier Advanced - Crystal Clear Water in 24 Hours

7.3

score

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Crystal Blue

Crystal Blue Pond Booster - Crystal Blue Pond Dye & Natural Pond Cleaner Combo - Treats up to 1 Acre - Crystal Blue Water While Reducing Muck & Sludge - 1 Gallon

7.0

score

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#10

Not Rocket Sciences

4X Blue Pond Dye - Transforms Murky Brown Water to Natural Blue Color - Super Concentrated Lake and Pond Dye - Liquid Pond Shade Treats Up to 1 Acre - Safe for Fish and Wildlife (32 oz)

7.0

score

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Best Natural Algaecides

API Pond ALGAEFIX Algae Control 1-Gallon Bottle

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

Splosht Large Fishpond/Waterfeature Pack - Dissolvable Sachets - No Measuring. Reduces Algae and Sludge Naturally - Safe for Fish and Aquatic Animals - Treats 150-13,600 litres (Large Pond)

API Pond-Zyme Sludge Destroyer Pond Cleaner with Natural Pond Bacteria and Barley, 8oz Container

Bird Bath & Fountain Maintenance - (8 Ounces) - Fast-Acting Enzyme-Based Formula Will Extend The Life of Your Water Feature, Aid in Maintaining a Balanced Ecosystem - Safe for All Birds & Animals

Tick Killz 8 Ounce Concentrate

Airpro TruBlu Concentrated Pond Dye, Aqua Blue (1qt) - Concentrated Colorant Shades Water for Temperature Control - Safe for Swimming and Wildlife - Professional Strength

Evolution Aqua Pure Pond Bomb - for Crystal Clear Healthy Water, Treats up to 20,000 litres

API POND ALGAEFIX Algae Control 16-Ounce Bottle (169B)

Birdbath & Fountain Protector 95566, 16 oz. for Clean and Clear Water, 16 Fl Oz (Pack of 1)

Microzyme Muck Fighter Pond Treatment Block | Lasts 30 days | Natural Pond Bacteria & Sludge Decomposing Enzymes | Water Clearing Odor Eliminating Microbes | Safe for Fish, Pets, & Recreation (4-pack)

MICROBE-LIFT Bird Bath Clear Two-in-One Water Cleaner and Surface Treatment for Outdoor Birdbaths and Fountains, Safe for Birds, Fish, and Frogs (Birdbath Clear 4-Ounce)

HTH 67067 Swimming Pool Care Clarifier Advanced - Crystal Clear Water in 24 Hours

Crystal Blue Pond Booster - Crystal Blue Pond Dye & Natural Pond Cleaner Combo - Treats up to 1 Acre - Crystal Blue Water While Reducing Muck & Sludge - 1 Gallon

4X Blue Pond Dye - Transforms Murky Brown Water to Natural Blue Color - Super Concentrated Lake and Pond Dye - Liquid Pond Shade Treats Up to 1 Acre - Safe for Fish and Wildlife (32 oz)

Algaecides

Natural Acnes

Pool Algaecides