Can Tanganyikan Clown Cichlid (Eretmodus) and Weeksi Bichir Live Together?

Tanganyikan Clown Cichlid (Eretmodus) is a semi-aggressive species (7/10), while Weeksi Bichir is moderately assertive (6/10). This modest difference means Tanganyikan Clown Cichlid (Eretmodus) may occasionally assert dominance over Weeksi Bichir.

Tanganyikan Clown Cichlid (Eretmodus) and Weeksi Bichir 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.

Worth noting: Weeksi Bichir is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Weeksi Bichir is a known jumper, so a tight-fitting lid is essential.

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 Tanganyikan Clown Cichlid (Eretmodus) (8–9.5) and Weeksi Bichir (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.

To house Tanganyikan Clown Cichlid (Eretmodus) and Weeksi Bichir together, plan for an aquarium of at least 470 litres with a minimum length of 150 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: Smooth Gravel (Sensitive Barbels), Established Algae (Otocinclus), Sand (Sifters), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater. Meeting these requirements will help both species thrive.

Tanganyikan Clown Cichlid (Eretmodus) prefers High (River/Stream) flow while Weeksi Bichir needs Low (Still Water) flow. Consider positioning filter outlets and using baffles to create zones of different current intensity within the same tank.

Tanganyikan Clown Cichlid (Eretmodus) and Weeksi Bichir 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.