Can Peacock Cichlid (Aulonocara) and Tire Track Eel Live Together?

Reviewed by Guidarium Editorial DeskUpdated April 28, 2026
Not Recommended

Peacock Cichlid (Aulonocara) and Tire Track 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

Peacock Cichlid (Aulonocara)

Aulonocara sp.

Tire Track Eel

Mastacembelus armatus

🐠Family Group
Peacock Cichlid (Aulonocara)
Cichlids - African
Tire Track Eel
Oddballs
Temperament
Peacock Cichlid (Aulonocara)
Semi-Aggressive (6/10)
Tire Track Eel
Semi-Aggressive (6/10)
Temperature
✓ Compatible
Peacock Cichlid (Aulonocara)
24–28°C
Tire Track Eel
22–28°C
pH Range
✗ No overlap
Peacock Cichlid (Aulonocara)
7.8–8.6
Tire Track Eel
6.5–7.5
Hardness (dGH)
✓ Compatible
Peacock Cichlid (Aulonocara)
10–25
Tire Track Eel
5–15
Water Type
✓ Compatible
Peacock Cichlid (Aulonocara)
Freshwater Only
Tire Track Eel
Freshwater Only
Flow Preference
✓ Compatible
Peacock Cichlid (Aulonocara)
Moderate
Tire Track Eel
Moderate
Min Tank Volume
Combined: 680 L
Peacock Cichlid (Aulonocara)
200 L
Tire Track Eel
680 L
Swimming Level
Shared: 1 zone
Peacock Cichlid (Aulonocara)
BottomMiddle
Tire Track Eel
Bottom
🏷️Behavior Tags
Peacock Cichlid (Aulonocara)
Territorial (Defends specific area)Aggressive to same species/look-alikesDigger (Disturbs Substrate)
Tire Track Eel
Piscivore (Eats small/nano fish)Shrimp EaterDigger (Disturbs Substrate)Jumper (Lid Required)NocturnalAggressive to same species/look-alikes
Stocking calculator

Can your tank handle Peacock Cichlid (Aulonocara) and Tire Track 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.

Peacock Cichlid (Aulonocara)
Tire Track Eel
Test both in my tank

Behaviour & Temperament

Both Peacock Cichlid (Aulonocara) and Tire Track Eel are moderately assertive species with an aggression score of 6/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.

Peacock Cichlid (Aulonocara) and Tire Track 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.

Worth noting: Tire Track Eel is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Tire Track 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 Peacock Cichlid (Aulonocara) (7.8–8.6) and Tire Track Eel (6.5–7.5) 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 Peacock Cichlid (Aulonocara) and Tire Track Eel 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

Peacock Cichlid (Aulonocara) and Tire Track Eel 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 Peacock Cichlid (Aulonocara) and Tire Track Eel.

Frequently Asked Questions

Can Peacock Cichlid (Aulonocara) and Tire Track Eel live together?

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

What size tank do Peacock Cichlid (Aulonocara) and Tire Track Eel 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 Peacock Cichlid (Aulonocara) and Tire Track Eel 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 Peacock Cichlid (Aulonocara) or Tire Track Eel aggressive?

Peacock Cichlid (Aulonocara) is moderately assertive (6/10) and Tire Track Eel is moderately assertive (6/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Peacock Cichlid (Aulonocara) and Tire Track Eel need?

Their pH requirements do not overlap. Peacock Cichlid (Aulonocara) prefers 7.8–8.6, while Tire Track Eel needs 6.5–7.5. 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 Tire Track Eel being nocturnal affect compatibility?

Tire Track 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 Tire Track Eel during evening hours.

Editorial Review

Guidarium Editorial Desk

Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.

Last reviewed
April 28, 2026
Last updated
April 28, 2026
Issues or corrections?
Contact the editorial team

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