Can Fire Eel and Peacock Cichlid (Aulonocara) Live Together?
Fire Eel and Peacock Cichlid (Aulonocara) 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 Fire Eel and Peacock Cichlid (Aulonocara)?
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
Fire Eel is a generally mild-mannered species (4/10), while Peacock Cichlid (Aulonocara) is moderately assertive (6/10). This modest difference means Peacock Cichlid (Aulonocara) may occasionally assert dominance over Fire Eel.
Fire Eel and Peacock Cichlid (Aulonocara) 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.
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 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.
The pH requirements of Fire Eel (6–7.5) and Peacock Cichlid (Aulonocara) (7.8–8.6) 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 Fire Eel and Peacock Cichlid (Aulonocara) together, plan for an aquarium of at least 680 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), 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.
Why This Pairing Usually Fails in Practice
Fire Eel and Peacock Cichlid (Aulonocara) 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 Fire Eel and Peacock Cichlid (Aulonocara).
Frequently Asked Questions
Can Fire Eel and Peacock Cichlid (Aulonocara) live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Fire Eel and Peacock Cichlid (Aulonocara) need?
A minimum of 680 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 Fire Eel and Peacock Cichlid (Aulonocara) 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 Fire Eel or Peacock Cichlid (Aulonocara) aggressive?
Fire Eel is generally mild-mannered (4/10) and Peacock Cichlid (Aulonocara) is moderately assertive (6/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Fire Eel and Peacock Cichlid (Aulonocara) need?
Their pH requirements do not overlap. Fire Eel prefers 6–7.5, while Peacock Cichlid (Aulonocara) needs 7.8–8.6. This makes them incompatible in the same water chemistry.
How do I manage Peacock Cichlid (Aulonocara)'s territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Peacock Cichlid (Aulonocara) 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 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.
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
- Editorial desk review
- Last updated
- Editorial desk review
- Issues or corrections?
- Contact the editorial team
Related Comparisons
Fire Eel & African Arowana
·
Fire Eel & Antennae Stingray
·
Fire Eel & Black Ghost Knifefish
·
Fire Eel & Flower Stingray
·
Fire Eel & Half Banded Spiny Eel
·
Fire Eel & Hystrix Stingray (Porcupine Ray)
·
Peacock Cichlid (Aulonocara) & Afra Cichlid
·
Peacock Cichlid (Aulonocara) & African Jewel Cichlid
·
Peacock Cichlid (Aulonocara) & Altolamprologus Calvus
·
Peacock Cichlid (Aulonocara) & Altolamprologus Compressiceps
·
Peacock Cichlid (Aulonocara) & Aurora Yellow Mbuna
·
Peacock Cichlid (Aulonocara) & Black Diamond Cichlid
·