Can Altolamprologus Calvus and Brevis Shelldweller Live Together?
Altolamprologus Calvus and Brevis Shelldweller are not recommended as tank mates due to 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 Altolamprologus Calvus and Brevis Shelldweller?
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.
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Behaviour & Temperament
Both Altolamprologus Calvus and Brevis Shelldweller are moderately assertive species with an aggression score of 5/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.
Altolamprologus Calvus and Brevis Shelldweller 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.
There is a critical concern: the Piscivore (Eats small/nano fish) behaviour of one fish directly conflicts with the Nano / Bite-sized (Predation Risk) trait of the other — piscivorous fish will prey on nano-sized tank mates..
Additional behavioural considerations to keep in mind: Two territorial species may clash over territory, especially in smaller tanks. Shrimp eaters may also prey on very small nano fish.
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.
Both fish can tolerate a pH between 8 and 9. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 10–25 dGH. Regular testing will ensure conditions stay within this range.
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Tank Setup
To house Altolamprologus Calvus and Brevis Shelldweller together, plan for an aquarium of at least 114 litres with a minimum length of 90 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), Shells (Breeding/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.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Altolamprologus Calvus and Brevis Shelldweller.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
Show 10 more tank sizes
Diet & Feeding
Feeding time deserves special attention with this pairing. Altolamprologus Calvus is a known shrimp eater and may prey on small invertebrates or nano fish like Brevis Shelldweller.
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Frequently Asked Questions
Can Altolamprologus Calvus and Brevis Shelldweller live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Altolamprologus Calvus and Brevis Shelldweller need?
A minimum of 114 litres (tank length at least 90 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 Altolamprologus Calvus and Brevis Shelldweller 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 Altolamprologus Calvus or Brevis Shelldweller aggressive?
Altolamprologus Calvus is moderately assertive (5/10) and Brevis Shelldweller is moderately assertive (5/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Altolamprologus Calvus and Brevis Shelldweller need?
Both species overlap in the 8–9 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
How do I manage Altolamprologus Calvus's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Altolamprologus Calvus 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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