Can Discus and Keyhole Cichlid Live Together?
Yes, Discus and Keyhole Cichlid are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. A minimum tank size of 300 litres is recommended.
At a Glance
Behaviour & Temperament
Discus is a generally mild-mannered species (4/10), while Keyhole Cichlid is peaceful (2/10). This modest difference means Discus may occasionally assert dominance over Keyhole Cichlid.
Discus and Keyhole Cichlid both frequent the Middle (Open Water) and 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.
Water Parameters
The safe temperature window for both species falls between 28°C and 28°C. Aim for the midpoint of this range (around 28.0°C) for optimal comfort.
Both fish can tolerate a pH between 6 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 2–12 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Discus and Keyhole Cichlid together, plan for an aquarium of at least 300 litres with a minimum length of 120 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), Driftwood (Digestion/Hiding), Leaf Litter/Blackwater, Plants - Densely covered. 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.
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Frequently Asked Questions
Can Discus and Keyhole Cichlid live together?▾
Yes. Discus and Keyhole Cichlid are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.
What size tank do Discus and Keyhole Cichlid need?▾
A minimum of 300 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 Discus and Keyhole Cichlid together?▾
Keep the aquarium between 28°C and 28°C. A target of around 28.0°C sits comfortably within both species' preferred ranges.
Are Discus or Keyhole Cichlid aggressive?▾
Discus is generally mild-mannered (4/10) and Keyhole Cichlid is peaceful (2/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Discus and Keyhole Cichlid need?▾
Both species overlap in the 6–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
How do I manage Discus's territorial behaviour?▾
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Discus 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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