Can Aequidens sp. Atabapo and Lake Wanam Rainbowfish Live Together?

Aequidens sp. Atabapo is a moderately assertive species (6/10), while Lake Wanam Rainbowfish is peaceful (2/10). This notable difference means Aequidens sp. Atabapo may occasionally assert dominance over Lake Wanam Rainbowfish.

Aequidens sp. Atabapo and Lake Wanam Rainbowfish 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.

Worth noting: Lake Wanam Rainbowfish is a known jumper, so a tight-fitting lid is essential.

The safe temperature window for both species falls between 25°C and 29°C. Aim for the midpoint of this range (around 27.0°C) for optimal comfort.

Both fish can tolerate a pH between 7 and 7. Maintaining a stable value within this band is more important than hitting an exact number.

Hardness requirements are incompatible: Aequidens sp. Atabapo needs 1–8 dGH while Lake Wanam Rainbowfish requires 10–20 dGH.

To house Aequidens sp. Atabapo and Lake Wanam Rainbowfish together, plan for an aquarium of at least 124 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), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Plants - Densely covered. Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Aequidens sp. Atabapo is a plant destroyer, which conflicts with Lake Wanam Rainbowfish's requirement for live plants. Compromise where possible or prioritise the more critical need.

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

Aequidens sp. Atabapo and Lake Wanam Rainbowfish 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.