Can Auratus Cichlid (Mbuna) and Brilliant Rummy-Nose Tetra Live Together?

Auratus Cichlid (Mbuna) is a highly aggressive species (9/10), while Brilliant Rummy-Nose Tetra is peaceful (1/10). This notable difference means Auratus Cichlid (Mbuna) may occasionally assert dominance over Brilliant Rummy-Nose Tetra.

Large aggression gap (8 points) between Auratus Cichlid (Mbuna) and Brilliant Rummy-Nose Tetra increases stress risk for the more peaceful fish.

Auratus Cichlid (Mbuna) and Brilliant Rummy-Nose Tetra 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.

The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.

The pH requirements of Auratus Cichlid (Mbuna) (7.6–8.6) and Brilliant Rummy-Nose Tetra (5–7) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Auratus Cichlid (Mbuna) needs 10–25 dGH while Brilliant Rummy-Nose Tetra requires 1–8 dGH.

To house Auratus Cichlid (Mbuna) and Brilliant Rummy-Nose Tetra together, plan for an aquarium of at least 258 litres with a minimum length of 120 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: Sand (Sifters), Established Algae (Otocinclus), Plants - Densely covered, Leaf Litter/Blackwater. Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Auratus Cichlid (Mbuna) is a plant destroyer, which conflicts with Brilliant Rummy-Nose Tetra's requirement for live plants. Compromise where possible or prioritise the more critical need.

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

Auratus Cichlid (Mbuna) and Brilliant Rummy-Nose Tetra are the kind of pair that can look acceptable in a shop but become a maintenance problem at home. The main risk is not a single number in the chart; it is the way incompatible behavior, water needs, or pressure on space compounds over time once both fish are established in the same tank.