Can Altum Angel and Black Belt Cichlid Live Together?

Altum Angel is a moderately assertive species (5/10), while Black Belt Cichlid is semi-aggressive (8/10). This modest difference means Black Belt Cichlid may occasionally assert dominance over Altum Angel.

Altum Angel and Black Belt Cichlid both frequent the 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.

Additional behavioural considerations to keep in mind: Aggressive fish may bully and stress shy, slow-moving species. Two territorial species may clash over territory, especially in smaller tanks.

The safe temperature window for both species falls between 27°C and 29°C. Aim for the midpoint of this range (around 28.0°C) for optimal comfort.

The pH requirements of Altum Angel (4.5–6.5) and Black Belt Cichlid (7–8) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Altum Angel needs 1–5 dGH while Black Belt Cichlid requires 8–20 dGH.

To house Altum Angel and Black Belt Cichlid together, plan for an aquarium of at least 450 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: Sand (Sifters), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Plants - Floating. Meeting these requirements will help both species thrive.

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

Altum Angel and Black Belt Cichlid 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.