Can Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) Live Together?
Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) are not recommended as tank mates due to conflicting pH requirements. 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 Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus)?
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.
Behaviour & Temperament
Colombian Tetra is a generally mild-mannered species (4/10), while Fosso Cichlid (Fossorochromis rostratus) is moderately assertive (6/10). This modest difference means Fosso Cichlid (Fossorochromis rostratus) may occasionally assert dominance over Colombian Tetra.
Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) both frequent the Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.
Water Parameters
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 Colombian Tetra (5.5–7.5) and Fosso Cichlid (Fossorochromis rostratus) (7.8–8.6) do not overlap, making it impossible to satisfy both species simultaneously.
For general hardness, the shared comfort zone is 10–15 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) together, plan for an aquarium of at least 680 litres with a minimum length of 180 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: Plants - Densely covered, Driftwood (Digestion/Hiding), Sand (Sifters). Meeting these requirements will help both species thrive.
Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.
Why This Pairing Usually Fails in Practice
Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) 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.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus).
Frequently Asked Questions
Can Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) need?
A minimum of 680 litres (tank length at least 180 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 Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) together?
Keep the aquarium between 24°C and 28°C. A target of around 26.0°C sits comfortably within both species' preferred ranges.
Are Colombian Tetra or Fosso Cichlid (Fossorochromis rostratus) aggressive?
Colombian Tetra is generally mild-mannered (4/10) and Fosso Cichlid (Fossorochromis rostratus) is moderately assertive (6/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Colombian Tetra and Fosso Cichlid (Fossorochromis rostratus) need?
Their pH requirements do not overlap. Colombian Tetra prefers 5.5–7.5, while Fosso Cichlid (Fossorochromis rostratus) needs 7.8–8.6. This makes them incompatible in the same water chemistry.
Will Colombian Tetra nip Fosso Cichlid (Fossorochromis rostratus)'s fins?
Colombian Tetra is a known fin nipper. If Fosso Cichlid (Fossorochromis rostratus) has long or flowing fins, there is a real risk of fin damage. Keeping Colombian Tetra in a larger group can help redirect nipping behaviour toward conspecifics.
How do I manage Fosso Cichlid (Fossorochromis rostratus)'s territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Fosso Cichlid (Fossorochromis rostratus) 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.
Shared setup supplies
We may earn from qualifying purchases
Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 6, 2026
- Last updated
- May 6, 2026
- Issues or corrections?
- Contact the editorial team
Related Comparisons
Colombian Tetra & Black Pacu
·
Colombian Tetra & Black Skirt Tetra
·
Colombian Tetra & Bleeding Heart Tetra
·
Colombian Tetra & Blind Cave Tetra
·
Colombian Tetra & Bloodfin Tetra
·
Colombian Tetra & Blue Emperor Tetra
·
Fosso Cichlid (Fossorochromis rostratus) & Afra Cichlid
·
Fosso Cichlid (Fossorochromis rostratus) & African Jewel Cichlid
·
Fosso Cichlid (Fossorochromis rostratus) & Altolamprologus Calvus
·
Fosso Cichlid (Fossorochromis rostratus) & Altolamprologus Compressiceps
·
Fosso Cichlid (Fossorochromis rostratus) & Aurora Yellow Mbuna
·
Fosso Cichlid (Fossorochromis rostratus) & Black Diamond Cichlid
·