Siamese Algae Eater (Crossocheilus siamensis)
The Siamese Algae Eater is a popular and hardy freshwater fish species ideal for community aquariums. Known for its ability to efficiently consume algae, it helps keep tank surfaces clean and reduces the need for frequent manual cleaning.
It is a small fish, typically growing to about 3 inches in length, with a distinctive silvery body and dark spots along the sides. This species is active during the day and prefers moderate water conditions.
Key Features
- Effective algae control in aquariums
- Peaceful and social behavior
- Adaptable to a range of water temperatures (72–82°F)
- Thrives in community tanks with compatible species
Specifications
| Feature | Detail |
|---|---|
| Scientific Name | Crossocheilus siamensis |
| Size | Up to 3 inches |
| Water Temperature | 72–82°F |
| Water pH | 6.0–7.5 |
| Hardness | Soft to medium |
| Lifespan | 5–8 years |
FAQ
What kind of tank setup is best for a Siamese Algae Eater?
A standard community aquarium with moderate water flow and plenty of surface area for algae growth works well. Include hiding spots such as plants or rocks to provide security.
Can Siamese Algae Eaters live with other fish?
Yes, they are generally peaceful and can coexist with other non-aggressive freshwater fish such as danios, guppies, and tetras.
How often should I feed a Siamese Algae Eater?
Feed once or twice daily in small amounts. They primarily consume algae, but can also be offered algae wafers or blanched vegetables occasionally.

Gordon Black –
Great addition to my 10-gallon tank. The fish has been eating algae on the glass and plants for weeks. It’s active and doesn’t stress other fish. Easy to care for and very affordable.
Una Clarkson –
I bought this for algae control and it’s working well. The fish is quiet and stays near the back of the tank. I’ve seen it nibbling on algae on the substrate and glass. A good pick for beginners.
Diane Watson –
Perfect for a small tank. It’s been two months and the algae has reduced significantly. The fish looks healthy and moves around naturally. No issues with compatibility with my danios.