Pond Care Algaefix - 2.5 gal.

SKU: 243857
Manufacturer: API
MPN: 169J

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Algaefix effectively controls green water, algae blooms and blanketweed in ponds and water gardens. This is a fish and plant safe algaecide that keeps pond and water gardens clear by controlling "green water". This product is also effective as a preventative measure. This bottle treats 96,000 U.S. gallons.

Read more about algae control in ornamental ponds and using algaecides here.

This product cannot be shipped to Canada.


Package Size2.5 gal.
Treats up to96,000 gal.
Active IngredientsPoly[oxyethylene(dimethylimino)ethylene(dimethyliminio)ethylene dichloride]
EPA Registration #8709-8-ZA
Internal Id

State Restrictions
British Columbia
New Brunswick
Northwest Territories
Nova Scotia
Prince Edward Island


Poly(oxyethylene(dimethyliminio) ethylene(dimethyliminio)ethylene dichloride which is the same active ingredient in all AlgaeFix products at 4.5% Click here for the MSDS Sheet for this product direct from the manufacturer (PDF viewer required).


Directions For Use:

Add 1 teaspoonful for every 50 gallons of pond/fountain water or 1/2 cup for every 1,200 gallons. Thoroughly mix into pond/fountain by adding near the pump outflow, waterfall, or aeration device. Can be mixed in a bucket of pond/fountain water and dispersed evenly around the pond/fountain. Repeat application every 3 days until algae is controlled. Be prepared to siphon out dead filamentous algae.

Once algal growth is under control, add one application per week. Weekly treatments will control algal growth and reduce pond/fountain maintenance.

Compatibility: Before using AlgaeFix, make certain that the pond has vigorous aeration, (a fountain, waterfall or aeration device) especially during hot summer months. In 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 consume oxygen. Decomposing organic matter also consumes oxygen, even after it is removed by the filter. Until the filter is changed, decomposing organic matter may still cause the oxygen level 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! Aeration must be provided to pond life at all times.

Caution: Do not use AlgaeFix with crustaceans, including: crabs, shrimp, freshwater shrimp, and freshwater lobsters.

Ratings & Reviews

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great product


excellent product ,have used it for over 10 years no problems with wildlife or pond population,have paired it with ultraviolet /bio filter for maximum results for my 2000 gal. pond should also use defoamer as the algae will cause foaming as it dies off from the algaefix, follow dosage amounts