Can Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish Live Together?

🔴Not Recommended

Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish 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

Demasoni Cichlid (Mbuna)

Chindongo demasoni

Peter's Elephantnose Fish

Gnathonemus petersii

🐠Family Group
Demasoni Cichlid (Mbuna)
Cichlids - African
Peter's Elephantnose Fish
Oddballs
Temperament
Demasoni Cichlid (Mbuna)
Highly Aggressive (9/10)
Peter's Elephantnose Fish
Mostly Peaceful (4/10)
Temperature
✓ Compatible
Demasoni Cichlid (Mbuna)
24–28°C
Peter's Elephantnose Fish
23–28°C
pH Range
✗ No overlap
Demasoni Cichlid (Mbuna)
7.6–8.6
Peter's Elephantnose Fish
6–7.5
Hardness (dGH)
✓ Compatible
Demasoni Cichlid (Mbuna)
10–25
Peter's Elephantnose Fish
2–15
Water Type
✓ Compatible
Demasoni Cichlid (Mbuna)
Freshwater Only
Peter's Elephantnose Fish
Freshwater Only
Flow Preference
✓ Compatible
Demasoni Cichlid (Mbuna)
High
Peter's Elephantnose Fish
Moderate
Min Tank Volume
Combined: 240 L
Demasoni Cichlid (Mbuna)
200 L
Peter's Elephantnose Fish
200 L
Swimming Level
Shared: 2 zones
Demasoni Cichlid (Mbuna)
BottomMiddle
Peter's Elephantnose Fish
BottomMiddle
🏷️Behavior Tags
Demasoni Cichlid (Mbuna)
Aggressive to same species/look-alikesTerritorial (Defends specific area)Plant DestroyerDigger (Disturbs Substrate)Hyperactive / Fast SwimmerGenerally Aggressive
Peter's Elephantnose Fish
NocturnalShy / Slow Moving (Easily Stressed)Jumper (Lid Required)Aggressive to same species/look-alikes

Behaviour & Temperament

Demasoni Cichlid (Mbuna) is a highly aggressive species (9/10), while Peter's Elephantnose Fish is generally mild-mannered (4/10). This notable difference means Demasoni Cichlid (Mbuna) may occasionally assert dominance over Peter's Elephantnose Fish.

Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish both frequent the Bottom (Substrate) and 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: Aggressive fish may bully and stress shy, slow-moving species. Hyperactive swimmers can stress shy, slow-moving species through constant motion.

Worth noting: Peter's Elephantnose Fish is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Peter's Elephantnose Fish 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 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.

The pH requirements of Demasoni Cichlid (Mbuna) (7.6–8.6) and Peter's Elephantnose Fish (6–7.5) 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 Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish 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: Sand (Sifters), Established Algae (Otocinclus), Smooth Gravel (Sensitive Barbels), Plants - lighly covered, Driftwood (Digestion/Hiding). Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Demasoni Cichlid (Mbuna) is a plant destroyer, which conflicts with Peter's Elephantnose Fish'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.

Find the right tank equipment

Browse tanks, décor, and equipment suited for this setup.

Frequently Asked Questions

Can Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish live together?

No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.

What size tank do Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish 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 Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish 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 Demasoni Cichlid (Mbuna) or Peter's Elephantnose Fish aggressive?

Demasoni Cichlid (Mbuna) is highly aggressive (9/10) and Peter's Elephantnose Fish is generally mild-mannered (4/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.

What pH do Demasoni Cichlid (Mbuna) and Peter's Elephantnose Fish need?

Their pH requirements do not overlap. Demasoni Cichlid (Mbuna) prefers 7.6–8.6, while Peter's Elephantnose Fish needs 6–7.5. This makes them incompatible in the same water chemistry.

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.

Does Peter's Elephantnose Fish being nocturnal affect compatibility?

Peter's Elephantnose Fish is most active after lights-out, which naturally reduces daytime encounters with its tank mate. This can actually be beneficial, as both fish get undisturbed time to feed and explore. Just ensure food reaches Peter's Elephantnose Fish during evening hours.


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