Can Fairy Cichlid (Brichardi) and Peacock Gudgeon Live Together?

Fairy Cichlid (Brichardi) is a semi-aggressive species (8/10), while Peacock Gudgeon is peaceful (2/10). This notable difference means Fairy Cichlid (Brichardi) may occasionally assert dominance over Peacock Gudgeon.

Large aggression gap (6 points) between Fairy Cichlid (Brichardi) and Peacock Gudgeon increases stress risk for the more peaceful fish.

Fairy Cichlid (Brichardi) and Peacock Gudgeon both frequent the Middle (Open Water) and 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.

Additional behavioural considerations to keep in mind: Aggressive fish may bully and stress shy, slow-moving species.

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.

The pH requirements of Fairy Cichlid (Brichardi) (8–9) and Peacock Gudgeon (6.5–7.5) do not overlap, making it impossible to satisfy both species simultaneously.

For general hardness, the shared comfort zone is 10–10 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.

To house Fairy Cichlid (Brichardi) and Peacock Gudgeon together, plan for an aquarium of at least 132 litres with a minimum length of 75 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.