API® AlgaeFix®

Control Algae Growth

  • Kill Algae Instantly
  • Clear Green Water Algae
  • Remove Excess Organic Debris

API® AlgaeFix® effectively controls many different types of green water algae, string or hair algae and blanketweed in ponds that contain live plants and fish. API® AlgaeFix® for ponds will kill existing algae blooms, keeping ornamental ponds and water gardens clean & clear. Once pond algae growth is under control, weekly doses of API AlgaeFix will control algae growth and reduce pond maintenance.

Tech Specs

Usage Information

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16 Ounces
32 Ounces
64 Ounces
1 Gallon
2.5 Gallons
Application Liquid Liquid Liquid Liquid Liquid
Gallons Treated Per Bottle 4,800 Gallons 9,600 Gallons 19,000 Gallons 38,000 Gallons 96,000 Gallons
Shelf Life 2 Years 2 Years 2 Years 2 Years 2 Years

Dosage Rates

Pond Size (In Gallons)
AlgaeFix® (As Needed)
500 1-2/3 Ounces
1,000 3-1/3 Ounces
1,500 5 Ounces
2,000 6-2/3 Ounces
3,000 10 Ounces

How To Apply

Add 1 teaspoon of AlgaeFix® for every 50 gallons of pond water or 1/2 cup for every 1,200 gallons (1 ounce treats 300 gallons). Thoroughly mix AlgaeFix® into pond water by adding near the pump outflow, waterfall, or aeration device. AlgaeFix® can be mixed in a bucket of pond water and dispersed evenly around the water body. Repeat application every 3 days until all algae is controlled, but be prepared to remove any and all dead algae from sides of the pond.

Once all algae growth is under control, add one application per week, as weekly treatments will assist in controlling algae growth and reduce water body maintenance.

Warm Weather Precaution

Before using AlgaeFix®, always make sure that the pond has vigorous aeration; a fountain, waterfall, or aeration device is recommended, especially during hot summer months. In extreme summer heat, pond water contains very little oxygen.

In sunlight, algae and submerged plants produce oxygen, and in some cases may be the major source of oxygen in the pond, at night however, submerged plants and algae actually will then consume oxygen. Decomposing organic matter (dead algae) also consumes oxygen, even after it is removed by the filter, so until the filter is cleaned, decomposing organic matter may still cause the oxygen levels to drop to harmful levels if adequate aeration is not provided.

Therefore, when using AlgaeFix®, especially during the warm summer months, adequate aeration is required to keep oxygen levels healthy for your fish. Do not shut off pond pumps or aeration devices at night, as aeration must be provided to pond life at all times.


Do not use AlgaeFix® with ponds containing invertebrates or crustaceans such as crabs, shrimps or crayfish.


Replacement Parts

Here are the replacement parts for API ® AlgaeFix ® .

Weeds Treated

The first step towards effectively treating any pond weed is proper identification. API® AlgaeFix® is recommended for use against each of the weeds listed below. Click on your desired weed for more information and alternate control options.