Can Apistogramma baenschi (Inca 50) and Swordtail Live Together?
Apistogramma baenschi (Inca 50) and Swordtail are not recommended as tank mates due to conflicting pH requirements and incompatible hardness ranges. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.
At a Glance
Can your tank handle Apistogramma baenschi (Inca 50) and Swordtail?
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 baenschi (Inca 50) is a moderately assertive species (5/10), while Swordtail is generally mild-mannered (4/10). This modest difference means Apistogramma baenschi (Inca 50) may occasionally assert dominance over Swordtail.
In terms of spatial distribution, Apistogramma baenschi (Inca 50) prefers the Bottom (Substrate) zone, whereas Swordtail occupies the Top (Surface) and Middle (Open Water) zones. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.
Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion.
Worth noting: Swordtail is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 22°C and 26°C. Aim for the midpoint of this range (around 24.0°C) for optimal comfort.
The pH requirements of Apistogramma baenschi (Inca 50) (4–6.5) and Swordtail (7–8.3) do not overlap, making it impossible to satisfy both species simultaneously.
Hardness requirements are incompatible: Apistogramma baenschi (Inca 50) needs 1–5 dGH while Swordtail requires 12–30 dGH.
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Tank Setup
To house Apistogramma baenschi (Inca 50) and Swordtail together, plan for an aquarium of at least 110 litres with a minimum length of 80 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. 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 baenschi (Inca 50) and Swordtail.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
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Frequently Asked Questions
Can Apistogramma baenschi (Inca 50) and Swordtail live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Apistogramma baenschi (Inca 50) and Swordtail need?
A minimum of 110 litres (tank length at least 80 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 baenschi (Inca 50) and Swordtail together?
Keep the aquarium between 22°C and 26°C. A target of around 24.0°C sits comfortably within both species' preferred ranges.
Are Apistogramma baenschi (Inca 50) or Swordtail aggressive?
Apistogramma baenschi (Inca 50) is moderately assertive (5/10) and Swordtail is generally mild-mannered (4/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Apistogramma baenschi (Inca 50) and Swordtail need?
Their pH requirements do not overlap. Apistogramma baenschi (Inca 50) prefers 4–6.5, while Swordtail needs 7–8.3. This makes them incompatible in the same water chemistry.
How do I manage Apistogramma baenschi (Inca 50)'s territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Apistogramma baenschi (Inca 50) 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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