Can Apistogramma uaupesi and Pangasius nasutus (Long-Nosed Pangasius) Live Together?

Apistogramma uaupesi is a moderately assertive species (5/10), while Pangasius nasutus (Long-Nosed Pangasius) is generally mild-mannered (4/10). This modest difference means Apistogramma uaupesi may occasionally assert dominance over Pangasius nasutus (Long-Nosed Pangasius).

Apistogramma uaupesi and Pangasius nasutus (Long-Nosed Pangasius) 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: Hyperactive swimmers can stress shy, slow-moving species through constant motion. Aggressive eaters may outcompete shy fish for food, leading to malnutrition.

Worth noting: Pangasius nasutus (Long-Nosed Pangasius) is a known jumper, so a tight-fitting lid is essential.

The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.

The pH requirements of Apistogramma uaupesi (4–6) and Pangasius nasutus (Long-Nosed Pangasius) (6.5–7.5) do not overlap, making it impossible to satisfy both species simultaneously.

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

To house Apistogramma uaupesi and Pangasius nasutus (Long-Nosed Pangasius) together, plan for an aquarium of at least 4000 litres with a minimum length of 300 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), Leaf Litter/Blackwater, Driftwood (Digestion/Hiding), Plants - Densely covered, Smooth Gravel (Sensitive Barbels). 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.

Apistogramma uaupesi and Pangasius nasutus (Long-Nosed Pangasius) 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.

Feeding time deserves special attention with this pairing. Pangasius nasutus (Long-Nosed Pangasius) is an aggressive eater that may prevent Apistogramma uaupesi from getting enough food.

Because Pangasius nasutus (Long-Nosed Pangasius) is a fast, competitive feeder, consider using sinking pellets or feeding at opposite ends of the setup to ensure Apistogramma uaupesi receives an adequate share.