Siamese Algae Eater
Crossocheilus oblongus is renowned for its voracious appetite for hair algae. A school of these fish will help ensure your plants and rocks are kept nice and clean at all times. Can be maintained alone although sometimes lone fish develop an attitude with age; a school of them (3-6 individuals or more) should keep aggression contained within the group.
These are juveniles around 1.5″ long.
| Specification | Value |
|---|---|
| Species | Crossocheilus oblongus |
| Size (adult) | Up to 2.5 inches |
| Age (when shipped) | Juvenile |
| Length at shipment | 1.5 inches |
| Group size recommended | 3-6 or more individuals |
FAQ
How many Siamese Algae Eaters should I keep in my aquarium?
It is recommended to keep a school of 3 to 6 individuals or more to help manage aggression and ensure peaceful behavior.
Do Siamese Algae Eaters eat other types of algae besides hair algae?
Primarily they target hair algae, but they may also consume other types of algae and plant matter.
Can a single Siamese Algae Eater be kept alone?
Yes, they can be kept alone, though they may become more aggressive with age. A group is recommended for better behavior.

Adam Greene –
My aquarium has been much cleaner since I added the Siamese Algae Eaters. They actively eat hair algae on plants and rocks. I now keep a group of five, and they seem to get along well. The fish are active and easy to care for.
Ruth Jones –
I started with one fish, but after a few weeks it started nipping at other fish. I added two more, and now the group is peaceful. They keep the algae under control and are a great addition to my tank.
Evan McGrath –
The juveniles arrived healthy and were about 1.5 inches. After a week, they started eating algae efficiently. I now have a school of four, and the tank looks much cleaner.