Siamese algae eater – Crossocheilus oblongus | Effective algae eater with lively schooling behavior

The Siamese algae eater (Crossocheilus oblongus) is one of the best natural algae eaters for freshwater aquariums. With its slender, silvery-grey body and characteristic black longitudinal stripe , it is not only useful but also visually appealing as a schooling fish.

This species is peaceful, active, and robust . It keeps the aquarium free of algae and is perfectly suited for planted community aquariums . The Siamese algae eater feels particularly comfortable in groups of five or more and displays its natural swimming behavior in all areas of the tank.

🌿 Characteristics & Attitude:
🐠 Fish size: S/M (4–5 cm, juvenile)
🌎 Origin: Southeast Asia (Thailand, Malaysia)
🌡️ Temperature: 22-28°C
💧 pH value: 6.0–7.5
⚖️ Total hardness: up to 15 °dGH
🐟 Social behavior: Peaceful, schooling fish (from 5 animals)
🌾 Aquarium: From 100 liters, with current, roots & algae growth

🍽️ Feeding:
It eats algae, biofilm, frozen and dry food . Spirulina, vegetable chips or blanched vegetables are ideal supplements.

💡 Tip:
The Siamese algae eater prefers oxygen-rich, clean water and a gentle current – ​​perfect for community tanks with moderate movement.

👉 Conclusion:
The Siamese algae eater (Crossocheilus oblongus) is a peaceful, hardy and effective algae eater – indispensable for any well-maintained freshwater aquarium.