Can Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) and Swordtail Live Together?

Both Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) and Swordtail are generally mild-mannered species with an aggression score of 4/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.

Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) and Swordtail 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: Hyperactive swimmers can stress shy, slow-moving species through constant motion.

Worth noting: Swordtail is a known jumper, so a tight-fitting lid is essential.

The safe temperature window for both species falls between 22°C and 28°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.

The pH requirements of Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) (4.5–6.5) and Swordtail (7–8.3) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) needs 1–5 dGH while Swordtail requires 12–30 dGH.

To house Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) and Swordtail together, plan for an aquarium of at least 110 litres with a minimum length of 80 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 - 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.

Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) and Swordtail 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.