Siamese Algea Eater

Siamese Algae Eater (Crossocheilus oblongus)

The Siamese Algae Eater is a highly valued freshwater aquarium fish, admired for its exceptional algae-eating abilities, peaceful temperament, and active, streamlined appearance. Native to the rivers and streams of Southeast Asia, this hardworking species is a favorite among aquarists for its usefulness in planted aquariums and its ability to help control unwanted algae growth. With its distinctive dark horizontal stripe and energetic swimming behavior, the Siamese Algae Eater adds both function and personality to community aquariums.

Siamese Algae Eaters are active, peaceful fish that spend much of their time exploring surfaces throughout the aquarium, grazing on algae from glass, rocks, plants, and décor. They are known for their ability to consume many types of algae, including some forms that other algae eaters often ignore. Their calm nature makes them excellent companions for a wide variety of community fish, and they are especially well suited for planted aquariums where they can contribute to a balanced ecosystem.

These hardy algae eaters thrive in well-maintained aquariums with plenty of swimming space, natural décor, and areas where algae and biofilm can naturally develop. Driftwood, rocks, and live plants provide grazing surfaces and help create a more natural environment. While algae forms an important part of their diet, they should also receive supplemental foods such as algae wafers, blanched vegetables, spirulina-based foods, and occasional frozen foods to ensure proper nutrition. Stable water quality and regular maintenance will help keep them healthy and active.

Quick Facts:

• Care Level: Easy
• Temperament: Peaceful
• Adult Size: 5–6 inches (12–15 cm)
• Minimum Tank Size: 30 gallons
• Temperature: 72–79°F (22–26°C)
• pH: 6.0–8.0
• Diet: Omnivore (primarily algae grazer)
• Schooling: No, but can be kept singly or in groups in larger aquariums

With their excellent algae-cleaning abilities, peaceful nature, and active personality, Siamese Algae Eaters are an outstanding choice for aquarists seeking a practical and attractive addition that helps maintain a healthy planted freshwater aquarium while providing constant movement and natural behavior.