Siamese Algae Eater

Overview

The Siamese Algae Eater (Crossocheilus langei) is an energetic social grazer that is one of the best fish for controlling black beard algae and brown algae. Requires a long aquarium and grows to 12–15 cm.

Water Parameters

• Temperature: 22–26°C (72–79°F)
• pH: 6.0–7.5
• Hardness: 5–15 dGH

Tank Setup

• Minimum tank size: 250 litres for 3+
• Decor: Planted with open swimming space; they are active and need room

Diet

• Base: They graze on algae — but need supplemental food
• Treats: Algae wafers, spirulina, blanched vegetables, flake
• Note: They eat a mixed diet — not purely algae eaters

Temperament & Tank Mates

• Temperament: Peaceful, very active schooling fish
• Best companions: Other medium-large peaceful fish — tetras, gouramis, corydoras
• Note: They grow large and need a long aquarium

Common Issues

• Not effective against black beard algae as adults — they lose interest
• Grow to 12–15 cm; need a large aquarium
• Can be mistaken for Flying Fox (Crossocheilus oblongus) — different species
• Lifespan: 5–10 years