Can Peacock Cichlid (Aulonocara) and Pygmy Corydoras Live Together?

Peacock Cichlid (Aulonocara) is a moderately assertive species (6/10), while Pygmy Corydoras is peaceful (0/10). This notable difference means Peacock Cichlid (Aulonocara) may occasionally assert dominance over Pygmy Corydoras.

Large aggression gap (6 points) between Peacock Cichlid (Aulonocara) and Pygmy Corydoras increases stress risk for the more peaceful fish.

Peacock Cichlid (Aulonocara) and Pygmy Corydoras both frequent the Bottom (Substrate) and Middle (Open Water) 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 Peacock Cichlid (Aulonocara) (7.8–8.6) and Pygmy Corydoras (6–7.5) 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 Peacock Cichlid (Aulonocara) and Pygmy Corydoras together, plan for an aquarium of at least 240 litres with a minimum length of 120 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), Smooth Gravel (Sensitive Barbels), Plants - Densely covered. 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.