Flagfish: Algae Eaters

The Pond Fish That Actually Eats Hair Algae.

Flagfish are the best natural solutions for controlling filamentous algae in ponds and water gardens. Unlike many species that ignore string algae and hair algae, Flagfish actively graze on it throughout the day, helping reduce unwanted algae growth naturally without chemicals.

Native to Florida, these hardy fish are well adapted to warm southern ponds. Their constant grazing behavior makes them an excellent choice for pond owners looking to improve water appearance and maintain a healthier balance in their aquatic environment.

Flagfish have earned a reputation as the most reliable and practical biological controls for filamentous “hair” algae.

If your pond struggles with string algae, hair algae, or excessive algae buildup around pond edges and vegetation, Flagfish are one of the few fish known to actively consume it. They pair well with Sailfin Mollies, Tilapia and Grass Carp.