Can Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) Live Together?
Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) 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
Denison Barb (Roseline Shark) is a generally mild-mannered species (3/10), while Duboisi Cichlid (Tropheus) is semi-aggressive (8/10). This notable difference means Duboisi Cichlid (Tropheus) may occasionally assert dominance over Denison Barb (Roseline Shark).
Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) both frequent the Middle (Open Water) and 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.
Worth noting: Denison Barb (Roseline Shark) is a known jumper, so a tight-fitting lid is essential.
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.
The pH requirements of Denison Barb (Roseline Shark) (6.5–7.8) and Duboisi Cichlid (Tropheus) (8–9) do not overlap, making it impossible to satisfy both species simultaneously.
For general hardness, the shared comfort zone is 10–25 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) together, plan for an aquarium of at least 336 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: Plants - Densely covered, Driftwood (Digestion/Hiding), Smooth Gravel (Sensitive Barbels), Sand (Sifters), Established Algae (Otocinclus). Meeting these requirements will help both species thrive.
Note a potential conflict in setup requirements: Duboisi Cichlid (Tropheus) is a plant destroyer, which conflicts with Denison Barb (Roseline Shark)'s requirement for live plants. Compromise where possible or prioritise the more critical need.
Both species do well with high (river/stream) water movement, so a standard filtration setup rated for the tank volume should suffice.
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Frequently Asked Questions
Can Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) live together?▾
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) need?▾
A minimum of 336 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 Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) 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 Denison Barb (Roseline Shark) or Duboisi Cichlid (Tropheus) aggressive?▾
Denison Barb (Roseline Shark) is generally mild-mannered (3/10) and Duboisi Cichlid (Tropheus) is semi-aggressive (8/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Denison Barb (Roseline Shark) and Duboisi Cichlid (Tropheus) need?▾
Their pH requirements do not overlap. Denison Barb (Roseline Shark) prefers 6.5–7.8, while Duboisi Cichlid (Tropheus) needs 8–9. This makes them incompatible in the same water chemistry.
How do I manage Duboisi Cichlid (Tropheus)'s territorial behaviour?▾
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Duboisi Cichlid (Tropheus) 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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