Can Julii Corydoras (False Julii) and Norman's Lampeye Killifish Live Together?

Julii Corydoras (False Julii) is a peaceful species (0/10), while Norman's Lampeye Killifish is peaceful (1/10). This modest difference means Norman's Lampeye Killifish may occasionally assert dominance over Julii Corydoras (False Julii).

In terms of spatial distribution, Julii Corydoras (False Julii) prefers the Bottom (Substrate) zone, whereas Norman's Lampeye Killifish occupies the Top (Surface) and Middle (Open Water) zones. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.

Worth noting: Norman's Lampeye Killifish is a known jumper, so a tight-fitting lid is essential.

The safe temperature window for both species falls between 22°C and 26°C. Aim for the midpoint of this range (around 24.0°C) for optimal comfort.

Both fish can tolerate a pH between 6.5 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 4–15 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.

To house Julii Corydoras (False Julii) and Norman's Lampeye Killifish together, plan for an aquarium of at least 72 litres with a minimum length of 60 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Sand (Sifters), Plants - Densely covered, Plants - Floating. Meeting these requirements will help both species thrive.

Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.