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

Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) is a generally mild-mannered species (4/10), while Clown Killifish is peaceful (2/10). This modest difference means Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) may occasionally assert dominance over Clown Killifish.

In terms of spatial distribution, Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) prefers the Bottom (Substrate) and Middle (Open Water) zones, whereas Clown Killifish occupies the Top (Surface) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.

Additional behavioural considerations to keep in mind: Shrimp eaters may also prey on very small nano fish.

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

To improve the chances of a peaceful coexistence in this community tank: Provide a significantly larger tank (at least 50% more volume than the minimum) to allow both Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) and Clown Killifish to establish separate territories. Add plenty of line-of-sight breaks using driftwood, rocks, and dense planting to reduce territorial confrontations.

The safe temperature window for both species falls between 23°C and 27°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.

Both fish can tolerate a pH between 5 and 6.5. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 1–5 dGH. Regular testing will ensure conditions stay within this range.

To house Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) and Clown Killifish together, plan for an aquarium of at least 54 litres with a minimum length of 60 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.

Specific environmental needs for this combination include: Sand (Sifters), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Plants - Floating, 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.

Feeding time deserves special attention with this pairing. Barlow's Dwarf Cichlid (Apistogramma Maulbrüter) is a known shrimp eater and may prey on small invertebrates or nano fish like Clown Killifish.