Can Espei Rasbora (Lambchop Rasbora) and True Julii Corydoras Live Together?

Espei Rasbora (Lambchop Rasbora) is a peaceful species (1/10), while True Julii Corydoras is peaceful (0/10). This modest difference means Espei Rasbora (Lambchop Rasbora) may occasionally assert dominance over True Julii Corydoras.

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

The safe temperature window for both species falls between 23°C and 26°C. Aim for the midpoint of this range (around 24.5°C) for optimal comfort.

Both fish can tolerate a pH between 6 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 2–12 dGH. Regular testing will ensure conditions stay within this range.

To house Espei Rasbora (Lambchop Rasbora) and True Julii Corydoras together, plan for an aquarium of at least 60 litres with a minimum length of 60 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

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: Plants - Densely covered, Leaf Litter/Blackwater, Sand (Sifters). Meeting these requirements will help both species thrive.

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