Can Apistogramma atahualpa and Apistogramma baenschi (Inca 50) Live Together?
Keeping Apistogramma atahualpa and Apistogramma baenschi (Inca 50) together is possible but requires caution due to potential behavioral clashes. Provide a spacious tank of at least 71 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Can your tank handle Apistogramma atahualpa and Apistogramma baenschi (Inca 50)?
Compatibility is only part of the answer. Test both fish with your real tank size, current stock, and maintenance needs to see if you have enough space and a safe stocking level before you add them.
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Behaviour & Temperament
Apistogramma atahualpa is a generally mild-mannered species (4/10), while Apistogramma baenschi (Inca 50) is moderately assertive (5/10). This modest difference means Apistogramma baenschi (Inca 50) may occasionally assert dominance over Apistogramma atahualpa.
Apistogramma atahualpa and Apistogramma baenschi (Inca 50) 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: Two territorial species may clash over territory, especially in smaller tanks.
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 Apistogramma atahualpa and Apistogramma baenschi (Inca 50) to establish separate territories. Add plenty of line-of-sight breaks using driftwood, rocks, and dense planting to reduce territorial confrontations.
Water Parameters
The safe temperature window for both species falls between 24°C and 26°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.
Both fish can tolerate a pH between 4.5 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.
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Tank Setup
To house Apistogramma atahualpa and Apistogramma baenschi (Inca 50) together, plan for an aquarium of at least 71 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), Leaf Litter/Blackwater, Driftwood (Digestion/Hiding), Plants - Densely covered. 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.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Apistogramma atahualpa and Apistogramma baenschi (Inca 50).
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
40 Gallon Breeder
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Frequently Asked Questions
Can Apistogramma atahualpa and Apistogramma baenschi (Inca 50) live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 71 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Apistogramma atahualpa and Apistogramma baenschi (Inca 50) need?
A minimum of 71 litres (tank length at least 60 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.
What water temperature is best for Apistogramma atahualpa and Apistogramma baenschi (Inca 50) together?
Keep the aquarium between 24°C and 26°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.
Are Apistogramma atahualpa or Apistogramma baenschi (Inca 50) aggressive?
Apistogramma atahualpa is generally mild-mannered (4/10) and Apistogramma baenschi (Inca 50) is moderately assertive (5/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Apistogramma atahualpa and Apistogramma baenschi (Inca 50) need?
Both species overlap in the 4.5–6.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
How do I manage Apistogramma atahualpa's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Apistogramma atahualpa space to claim a territory without encroaching on the other fish's area. Adding décor that divides the tank into distinct zones works especially well.
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