Can Black Phantom Tetra and Neolamprologus Fasciatus Live Together?
Black Phantom Tetra and Neolamprologus Fasciatus are not recommended as tank mates due to conflicting pH requirements and piscivorous fish will prey on nano-sized tank mates.. 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 Black Phantom Tetra and Neolamprologus Fasciatus?
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
Black Phantom Tetra is a peaceful species (2/10), while Neolamprologus Fasciatus is moderately assertive (6/10). This notable difference means Neolamprologus Fasciatus may occasionally assert dominance over Black Phantom Tetra.
Black Phantom Tetra and Neolamprologus Fasciatus 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.
There is a critical concern: the Nano / Bite-sized (Predation Risk) behaviour of one fish directly conflicts with the Piscivore (Eats small/nano fish) trait of the other — piscivorous fish will prey on nano-sized tank mates..
Additional behavioural considerations to keep in mind: Shrimp eaters may also prey on very small nano fish.
Water Parameters
The safe temperature window for both species falls between 24°C and 27°C. Aim for the midpoint of this range (around 25.5°C) for optimal comfort.
The pH requirements of Black Phantom Tetra (5–7.5) and Neolamprologus Fasciatus (7.8–9) 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 Black Phantom Tetra and Neolamprologus Fasciatus together, plan for an aquarium of at least 200 litres with a minimum length of 120 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: Plants - Densely covered, Plants - Floating, Leaf Litter/Blackwater, Sand (Sifters), Shells (Breeding/Hiding). Meeting these requirements will help both species thrive.
Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.
Why This Pairing Usually Fails in Practice
Black Phantom Tetra and Neolamprologus Fasciatus 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 Black Phantom Tetra and Neolamprologus Fasciatus.
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
Diet & Feeding
Feeding time deserves special attention with this pairing. Neolamprologus Fasciatus is a known shrimp eater and may prey on small invertebrates or nano fish like Black Phantom Tetra.
Frequently Asked Questions
Can Black Phantom Tetra and Neolamprologus Fasciatus live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Black Phantom Tetra and Neolamprologus Fasciatus need?
A minimum of 200 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 Black Phantom Tetra and Neolamprologus Fasciatus together?
Keep the aquarium between 24°C and 27°C. A target of around 25.5°C sits comfortably within both species' preferred ranges.
Are Black Phantom Tetra or Neolamprologus Fasciatus aggressive?
Black Phantom Tetra is peaceful (2/10) and Neolamprologus Fasciatus is moderately assertive (6/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Black Phantom Tetra and Neolamprologus Fasciatus need?
Their pH requirements do not overlap. Black Phantom Tetra prefers 5–7.5, while Neolamprologus Fasciatus needs 7.8–9. This makes them incompatible in the same water chemistry.
How do I manage Neolamprologus Fasciatus's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Neolamprologus Fasciatus 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.
Shared setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 6, 2026
- Last updated
- May 6, 2026
- Issues or corrections?
- Contact the editorial team
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