Can Arulius Barb and Demasoni Cichlid (Mbuna) Live Together?
Arulius Barb and Demasoni Cichlid (Mbuna) 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 Arulius Barb and Demasoni Cichlid (Mbuna)?
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
Arulius Barb is a generally mild-mannered species (4/10), while Demasoni Cichlid (Mbuna) is highly aggressive (9/10). This notable difference means Demasoni Cichlid (Mbuna) may occasionally assert dominance over Arulius Barb.
Arulius Barb and Demasoni Cichlid (Mbuna) 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: Arulius Barb 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 25°C. Aim for the midpoint of this range (around 24.5°C) for optimal comfort.
The pH requirements of Arulius Barb (6–7.5) and Demasoni Cichlid (Mbuna) (7.6–8.6) 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 Arulius Barb and Demasoni Cichlid (Mbuna) together, plan for an aquarium of at least 200 litres with a minimum length of 120 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: Smooth Gravel (Sensitive Barbels), Sand (Sifters), Established Algae (Otocinclus). Meeting these requirements will help both species thrive.
Both species do well with high (river/stream) water movement, so a standard filtration setup rated for the tank volume should suffice.
Why This Pairing Usually Fails in Practice
Arulius Barb and Demasoni Cichlid (Mbuna) 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 Arulius Barb and Demasoni Cichlid (Mbuna).
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
Frequently Asked Questions
Can Arulius Barb and Demasoni Cichlid (Mbuna) live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Arulius Barb and Demasoni Cichlid (Mbuna) need?
A minimum of 200 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 Arulius Barb and Demasoni Cichlid (Mbuna) together?
Keep the aquarium between 24°C and 25°C. A target of around 24.5°C sits comfortably within both species' preferred ranges.
Are Arulius Barb or Demasoni Cichlid (Mbuna) aggressive?
Arulius Barb is generally mild-mannered (4/10) and Demasoni Cichlid (Mbuna) is highly aggressive (9/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Arulius Barb and Demasoni Cichlid (Mbuna) need?
Their pH requirements do not overlap. Arulius Barb prefers 6–7.5, while Demasoni Cichlid (Mbuna) needs 7.6–8.6. This makes them incompatible in the same water chemistry.
Will Arulius Barb nip Demasoni Cichlid (Mbuna)'s fins?
Arulius Barb is a known fin nipper. If Demasoni Cichlid (Mbuna) has long or flowing fins, there is a real risk of fin damage. Keeping Arulius Barb in a larger group can help redirect nipping behaviour toward conspecifics.
How do I manage Demasoni Cichlid (Mbuna)'s territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Demasoni Cichlid (Mbuna) 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
- April 29, 2026
- Last updated
- April 29, 2026
- Issues or corrections?
- Contact the editorial team
Related Comparisons
Arulius Barb & Bala Shark
·
Arulius Barb & Denison Barb (Roseline Shark)
·
Arulius Barb & Filament Barb
·
Arulius Barb & Tinfoil Barb
·
Arulius Barb & Black Ruby Barb
·
Arulius Barb & Celestial Pearl Danio (Galaxy Rasbora)
·
Demasoni Cichlid (Mbuna) & Afra Cichlid
·
Demasoni Cichlid (Mbuna) & African Jewel Cichlid
·
Demasoni Cichlid (Mbuna) & Auratus Cichlid (Mbuna)
·
Demasoni Cichlid (Mbuna) & Aurora Yellow Mbuna
·
Demasoni Cichlid (Mbuna) & Black Diamond Cichlid
·
Demasoni Cichlid (Mbuna) & Buccochromis rhoadesii
·