Can Agassiz's Dwarf Cichlid and Pangasius nasutus (Long-Nosed Pangasius) Live Together?

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

Agassiz's Dwarf Cichlid 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.

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 Agassiz's Dwarf Cichlid and Pangasius nasutus (Long-Nosed Pangasius) to establish separate territories. Add plenty of line-of-sight breaks using driftwood, rocks, and dense planting to reduce territorial confrontations. A larger aquarium with ample hiding spots can help diffuse aggression and give the less dominant fish space to retreat.

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.

Both fish can tolerate a pH between 6.5 and 7. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 5–8 dGH. Regular testing will ensure conditions stay within this range.

To house Agassiz's Dwarf Cichlid 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.

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), 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.

Feeding time deserves special attention with this pairing. Pangasius nasutus (Long-Nosed Pangasius) is an aggressive eater that may prevent Agassiz's Dwarf Cichlid 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 Agassiz's Dwarf Cichlid receives an adequate share.