Can Black Fin Cory and Cyprichromis Leptosoma Live Together?
Black Fin Cory and Cyprichromis Leptosoma 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 Black Fin Cory and Cyprichromis Leptosoma?
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 Fin Cory is a peaceful species (1/10), while Cyprichromis Leptosoma is generally mild-mannered (3/10). This modest difference means Cyprichromis Leptosoma may occasionally assert dominance over Black Fin Cory.
In terms of spatial distribution, Black Fin Cory prefers the Bottom (Substrate) zone, whereas Cyprichromis Leptosoma occupies the Top (Surface) and Middle (Open Water) zones. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.
Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion.
Worth noting: Cyprichromis Leptosoma 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 26°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.
The pH requirements of Black Fin Cory (6–7.5) and Cyprichromis Leptosoma (8–9) do not overlap, making it impossible to satisfy both species simultaneously.
For general hardness, the shared comfort zone is 8–15 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Black Fin Cory and Cyprichromis Leptosoma 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: Sand (Sifters), Smooth Gravel (Sensitive Barbels), Leaf Litter/Blackwater. 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 Fin Cory and Cyprichromis Leptosoma 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 Fin Cory and Cyprichromis Leptosoma.
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
Frequently Asked Questions
Can Black Fin Cory and Cyprichromis Leptosoma live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Black Fin Cory and Cyprichromis Leptosoma 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 Fin Cory and Cyprichromis Leptosoma together?
Keep the aquarium between 24°C and 26°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.
Are Black Fin Cory or Cyprichromis Leptosoma aggressive?
Black Fin Cory is peaceful (1/10) and Cyprichromis Leptosoma is generally mild-mannered (3/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Black Fin Cory and Cyprichromis Leptosoma need?
Their pH requirements do not overlap. Black Fin Cory prefers 6–7.5, while Cyprichromis Leptosoma needs 8–9. This makes them incompatible in the same water chemistry.
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 4, 2026
- Last updated
- May 4, 2026
- Issues or corrections?
- Contact the editorial team
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