Can Bullseye Catfish and Intermedius Cichlid Live Together?
Bullseye Catfish and Intermedius Cichlid 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 Bullseye Catfish and Intermedius Cichlid?
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
Bullseye Catfish is a moderately assertive species (6/10), while Intermedius Cichlid is moderately assertive (5/10). This modest difference means Bullseye Catfish may occasionally assert dominance over Intermedius Cichlid.
Bullseye Catfish and Intermedius Cichlid both frequent the Bottom (Substrate) and 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.
Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion.
Worth noting: Bullseye Catfish is nocturnal and will be most active after lights-out, naturally reducing daytime encounters.
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 Bullseye Catfish (6–7.5) and Intermedius Cichlid (7.6–8.8) do not overlap, making it impossible to satisfy both species simultaneously.
For general hardness, the shared comfort zone is 10–20 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Bullseye Catfish and Intermedius Cichlid together, plan for an aquarium of at least 450 litres with a minimum length of 150 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: Driftwood (Digestion/Hiding), Smooth Gravel (Sensitive Barbels), Plants - Floating, Sand (Sifters). 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
Bullseye Catfish and Intermedius Cichlid 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 Bullseye Catfish and Intermedius Cichlid.
Frequently Asked Questions
Can Bullseye Catfish and Intermedius Cichlid live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Bullseye Catfish and Intermedius Cichlid need?
A minimum of 450 litres (tank length at least 150 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 Bullseye Catfish and Intermedius Cichlid 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 Bullseye Catfish or Intermedius Cichlid aggressive?
Bullseye Catfish is moderately assertive (6/10) and Intermedius Cichlid is moderately assertive (5/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Bullseye Catfish and Intermedius Cichlid need?
Their pH requirements do not overlap. Bullseye Catfish prefers 6–7.5, while Intermedius Cichlid needs 7.6–8.8. This makes them incompatible in the same water chemistry.
How do I manage Intermedius Cichlid's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Intermedius Cichlid 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 Bullseye Catfish being nocturnal affect compatibility?
Bullseye Catfish 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 Bullseye Catfish during evening hours.
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 11, 2026
- Last updated
- May 11, 2026
- Issues or corrections?
- Contact the editorial team
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