Can Julii Corydoras (False Julii) and Shell Dweller (Multi) Live Together?

Julii Corydoras (False Julii) is a peaceful species (0/10), while Shell Dweller (Multi) is moderately assertive (6/10). This notable difference means Shell Dweller (Multi) may occasionally assert dominance over Julii Corydoras (False Julii).

Large aggression gap (6 points) between Julii Corydoras (False Julii) and Shell Dweller (Multi) increases stress risk for the more peaceful fish.

Julii Corydoras (False Julii) and Shell Dweller (Multi) both frequent the Bottom (Substrate) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

The safe temperature window for both species falls between 24°C and 26°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.

The pH requirements of Julii Corydoras (False Julii) (6–7.5) and Shell Dweller (Multi) (7.8–9) do not overlap, making it impossible to satisfy both species simultaneously.

For general hardness, the shared comfort zone is 10–15 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 Shell Dweller (Multi) 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), Shells (Breeding/Hiding). 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.