Can Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) Live Together?
Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) 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
Behaviour & Temperament
Bucktooth Tetra (Exodon) is a highly aggressive species (9/10), while Fairy Cichlid (Brichardi) is semi-aggressive (8/10). This modest difference means Bucktooth Tetra (Exodon) may occasionally assert dominance over Fairy Cichlid (Brichardi).
Both Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) are highly aggressive, increasing the risk of violent confrontations.
Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) 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.
Additional behavioural considerations to keep in mind: Two aggressive species housed together increases risk of fighting.
Worth noting: Bucktooth Tetra (Exodon) is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 23°C and 27°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.
The pH requirements of Bucktooth Tetra (Exodon) (5.5–7.5) and Fairy Cichlid (Brichardi) (8–9) 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. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) together, plan for an aquarium of at least 240 litres with a minimum length of 120 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.
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: Driftwood (Digestion/Hiding), Sand (Sifters), Smooth Gravel (Sensitive Barbels). 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.
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Frequently Asked Questions
Can Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) live together?▾
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) need?▾
A minimum of 240 litres (tank length at least 120 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 Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) together?▾
Keep the aquarium between 23°C and 27°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.
Are Bucktooth Tetra (Exodon) or Fairy Cichlid (Brichardi) aggressive?▾
Bucktooth Tetra (Exodon) is highly aggressive (9/10) and Fairy Cichlid (Brichardi) is semi-aggressive (8/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Bucktooth Tetra (Exodon) and Fairy Cichlid (Brichardi) need?▾
Their pH requirements do not overlap. Bucktooth Tetra (Exodon) prefers 5.5–7.5, while Fairy Cichlid (Brichardi) needs 8–9. This makes them incompatible in the same water chemistry.
Will Bucktooth Tetra (Exodon) nip Fairy Cichlid (Brichardi)'s fins?▾
Bucktooth Tetra (Exodon) is a known fin nipper. If Fairy Cichlid (Brichardi) has long or flowing fins, there is a real risk of fin damage. Keeping Bucktooth Tetra (Exodon) in a larger group can help redirect nipping behaviour toward conspecifics.
How do I manage Fairy Cichlid (Brichardi)'s territorial behaviour?▾
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Fairy Cichlid (Brichardi) 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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