Can Altolamprologus Compressiceps and Apistogramma baenschi (Inca 50) Live Together?

Altolamprologus Compressiceps is a moderately assertive species (6/10), while Apistogramma baenschi (Inca 50) is moderately assertive (5/10). This modest difference means Altolamprologus Compressiceps may occasionally assert dominance over Apistogramma baenschi (Inca 50).

Altolamprologus Compressiceps and Apistogramma baenschi (Inca 50) 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.

Additional behavioural considerations to keep in mind: Two territorial species may clash over territory, especially in smaller tanks.

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 Altolamprologus Compressiceps (7.8–9) and Apistogramma baenschi (Inca 50) (4–6.5) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Altolamprologus Compressiceps needs 10–25 dGH while Apistogramma baenschi (Inca 50) requires 1–5 dGH.

To house Altolamprologus Compressiceps and Apistogramma baenschi (Inca 50) together, plan for an aquarium of at least 150 litres with a minimum length of 90 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), Shells (Breeding/Hiding), Leaf Litter/Blackwater, Driftwood (Digestion/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.

Altolamprologus Compressiceps and Apistogramma baenschi (Inca 50) 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.