Balloon Red Eye Tetra (Moenkhausia sanctaefilomenae)
Balloon Red Eye Tetra (Moenkhausia sanctaefilomenae) brings schooling movement with a clearly named colour or pattern to a suitably prepared aquarium. Plan its home around adult space, water, diet and social needs rather than the current sale size.
Quick Facts
- Scientific name: Moenkhausia sanctaefilomenae
- Product type: schooling freshwater fish
- Sale unit: One individual per quantity ordered unless the listing states otherwise
- Social needs: Social fish generally best kept in an appropriate group; fin-nipping potential varies by species
Specifications
| Feature | Detail |
|---|---|
| Scientific Name | Moenkhausia sanctaefilomenae |
| Species Type | Schooling freshwater fish |
| Minimum Group Size | 6 or more individuals |
| Water Temperature | 72–82°F |
| Water pH | 6.0–7.5 |
| Hardness | 2–10 dGH |
FAQ
What is the ideal group size for Balloon Red Eye Tetras?
Balloon Red Eye Tetras are social fish and should be kept in a group of at least six to ensure natural behavior and reduce stress.
Are these fish prone to fin-nipping?
Fin-nipping potential varies by species, but Balloon Red Eye Tetras are generally mild. However, they may show aggression in small groups or with incompatible tankmates.
What water conditions do they prefer?
They thrive in water temperatures between 72–82°F, pH levels between 6.0–7.5, and water hardness of 2–10 dGH.

Gabrielle Clark –
The Balloon Red Eye Tetras are vibrant and active, adding a lively touch to my community tank. I kept them in a group of six and they swim together in coordinated patterns. Water parameters were stable, and they seem healthy after two months.
Austin Harris –
Great coloration and movement. I added them to a 20-gallon tank with other tetras and they get along well. I do need to keep them in a group, though, or they appear shy and isolated.
Wendy McDonald –
These fish are a joy to watch. Their red eyes stand out in the tank, and they form a nice school. I maintain a consistent temperature and pH, and they haven’t shown any signs of aggression.