Can Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye Live Together?

🔴Not Recommended

Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye 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

Fairy Cichlid (Brichardi)

Neolamprologus brichardi

Gertrude's Spotted Blue-eye

Pseudomugil gertrudae

🐠Family Group
Fairy Cichlid (Brichardi)
Cichlids - African
Gertrude's Spotted Blue-eye
Rainbowfish
Temperament
Fairy Cichlid (Brichardi)
Aggressive (8/10)
Gertrude's Spotted Blue-eye
Peaceful (2/10)
Temperature
✓ Compatible
Fairy Cichlid (Brichardi)
23–27°C
Gertrude's Spotted Blue-eye
21–28°C
pH Range
✗ No overlap
Fairy Cichlid (Brichardi)
8–9
Gertrude's Spotted Blue-eye
6–7.5
Hardness (dGH)
✓ Compatible
Fairy Cichlid (Brichardi)
10–25
Gertrude's Spotted Blue-eye
5–15
Water Type
✓ Compatible
Fairy Cichlid (Brichardi)
Freshwater Only
Gertrude's Spotted Blue-eye
Freshwater Only
Flow Preference
✓ Compatible
Fairy Cichlid (Brichardi)
Moderate
Gertrude's Spotted Blue-eye
Moderate
Min Tank Volume
Combined: 132 L
Fairy Cichlid (Brichardi)
110 L
Gertrude's Spotted Blue-eye
38 L
Swimming Level
Shared: 1 zone
Fairy Cichlid (Brichardi)
MiddleBottom
Gertrude's Spotted Blue-eye
TopMiddle
🏷️Behavior Tags
Fairy Cichlid (Brichardi)
Territorial (Defends specific area)Digger (Disturbs Substrate)Fry PredatorGenerally AggressiveAggressive to same species/look-alikes
Gertrude's Spotted Blue-eye
Nano / Bite-sized (Predation Risk)Hyperactive / Fast SwimmerJumper (Lid Required)Fry Predator

Behaviour & Temperament

Fairy Cichlid (Brichardi) is a semi-aggressive species (8/10), while Gertrude's Spotted Blue-eye is peaceful (2/10). This notable difference means Fairy Cichlid (Brichardi) may occasionally assert dominance over Gertrude's Spotted Blue-eye.

Large aggression gap (6 points) between Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye increases stress risk for the more peaceful fish.

Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye both frequent the 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.

Worth noting: Gertrude's Spotted Blue-eye is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 23°C and 27°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.

The pH requirements of Fairy Cichlid (Brichardi) (8–9) and Gertrude's Spotted Blue-eye (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 Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye together, plan for an aquarium of at least 132 litres with a minimum length of 75 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), Smooth Gravel (Sensitive Barbels), Plants - Densely covered, Plants - Floating, Leaf Litter/Blackwater. 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.

Find the right tank equipment

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

Frequently Asked Questions

Can Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye live together?

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

What size tank do Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye need?

A minimum of 132 litres (tank length at least 75 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 Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye together?

Keep the aquarium between 23°C and 27°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.

Are Fairy Cichlid (Brichardi) or Gertrude's Spotted Blue-eye aggressive?

Fairy Cichlid (Brichardi) is semi-aggressive (8/10) and Gertrude's Spotted Blue-eye is peaceful (2/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.

What pH do Fairy Cichlid (Brichardi) and Gertrude's Spotted Blue-eye need?

Their pH requirements do not overlap. Fairy Cichlid (Brichardi) prefers 8–9, while Gertrude's Spotted Blue-eye needs 6–7.5. This makes them incompatible in the same water chemistry.

How do I manage Fairy Cichlid (Brichardi)'s territorial behaviour?

Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Fairy Cichlid (Brichardi) 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.


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