Can Apistogramma atahualpa and Blue Dolphin (Hap) Live Together?

Apistogramma atahualpa is a generally mild-mannered species (4/10), while Blue Dolphin (Hap) is moderately assertive (5/10). This modest difference means Blue Dolphin (Hap) may occasionally assert dominance over Apistogramma atahualpa.

Apistogramma atahualpa and Blue Dolphin (Hap) 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.

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 atahualpa (4.5–6.5) and Blue Dolphin (Hap) (7.5–8.6) do not overlap, making it impossible to satisfy both species simultaneously.

Hardness requirements are incompatible: Apistogramma atahualpa needs 0–5 dGH while Blue Dolphin (Hap) requires 10–25 dGH.

To house Apistogramma atahualpa and Blue Dolphin (Hap) together, plan for an aquarium of at least 475 litres with a minimum length of 150 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.