Can Auratus Cichlid (Mbuna) and Fire Eel Live Together?

Not Recommended

Auratus Cichlid (Mbuna) and Fire Eel 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

Auratus Cichlid (Mbuna)

Melanochromis auratus

Fire Eel

Mastacembelus erythrotaenia

🐠Family Group
Auratus Cichlid (Mbuna)
Cichlids - African
Fire Eel
Oddballs
Temperament
Auratus Cichlid (Mbuna)
Highly Aggressive (9/10)
Fire Eel
Mostly Peaceful (4/10)
Temperature
βœ“ Compatible
Auratus Cichlid (Mbuna)
23–28Β°C
Fire Eel
24–28Β°C
pH Range
βœ— No overlap
Auratus Cichlid (Mbuna)
7.6–8.6
Fire Eel
6–7.5
Hardness (dGH)
βœ“ Compatible
Auratus Cichlid (Mbuna)
10–25
Fire Eel
5–15
Water Type
βœ“ Compatible
Auratus Cichlid (Mbuna)
Freshwater Only
Fire Eel
Freshwater Only
Flow Preference
βœ“ Compatible
Auratus Cichlid (Mbuna)
Moderate
Fire Eel
Moderate
Min Tank Volume
Combined: 694 L
Auratus Cichlid (Mbuna)
200 L
Fire Eel
680 L
Swimming Level
Shared: 1 zone
Auratus Cichlid (Mbuna)
MiddleBottom
Fire Eel
Bottom
🏷️Behavior Tags
Auratus Cichlid (Mbuna)
Generally AggressiveAggressive to same species/look-alikesTerritorial (Defends specific area)Hyperactive / Fast SwimmerDigger (Disturbs Substrate)Plant Destroyer
Fire Eel
Piscivore (Eats small/nano fish)Shrimp EaterDigger (Disturbs Substrate)Jumper (Lid Required)NocturnalShy / Slow Moving (Easily Stressed)
Stocking calculator

Can your tank handle Auratus Cichlid (Mbuna) and Fire Eel?

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.

Auratus Cichlid (Mbuna)
Fire Eel
Test both in my tank

Behaviour & Temperament

Auratus Cichlid (Mbuna) is a highly aggressive species (9/10), while Fire Eel is generally mild-mannered (4/10). This notable difference means Auratus Cichlid (Mbuna) may occasionally assert dominance over Fire Eel.

Auratus Cichlid (Mbuna) and Fire Eel both frequent the 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.

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: Fire Eel is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Fire Eel is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 24Β°C and 28Β°C. Aim for the midpoint of this range (around 26.0Β°C) for optimal comfort.

The pH requirements of Auratus Cichlid (Mbuna) (7.6–8.6) and Fire Eel (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.

Tank Setup

To house Auratus Cichlid (Mbuna) and Fire Eel together, plan for an aquarium of at least 694 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: Sand (Sifters), Established Algae (Otocinclus), Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/Hiding). 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.

Frequently Asked Questions

Can Auratus Cichlid (Mbuna) and Fire Eel live together?

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

What size tank do Auratus Cichlid (Mbuna) and Fire Eel need?

A minimum of 694 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 Auratus Cichlid (Mbuna) and Fire Eel together?

Keep the aquarium between 24Β°C and 28Β°C. A target of around 26.0Β°C sits comfortably within both species' preferred ranges.

Are Auratus Cichlid (Mbuna) or Fire Eel aggressive?

Auratus Cichlid (Mbuna) is highly aggressive (9/10) and Fire Eel 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 Auratus Cichlid (Mbuna) and Fire Eel need?

Their pH requirements do not overlap. Auratus Cichlid (Mbuna) prefers 7.6–8.6, while Fire Eel needs 6–7.5. This makes them incompatible in the same water chemistry.

How do I manage Auratus Cichlid (Mbuna)'s territorial behaviour?

Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Auratus Cichlid (Mbuna) space to claim a territory without encroaching on the other fish's area. Adding dΓ©cor that divides the tank into distinct zones works especially well.

Does Fire Eel being nocturnal affect compatibility?

Fire Eel 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 Fire Eel during evening hours.


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