Can Malawi Hawk and Peacock Gudgeon Live Together?
Malawi Hawk and Peacock Gudgeon 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 Malawi Hawk and Peacock Gudgeon?
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
Malawi Hawk is a semi-aggressive species (7/10), while Peacock Gudgeon is peaceful (2/10). This notable difference means Malawi Hawk may occasionally assert dominance over Peacock Gudgeon.
Malawi Hawk and Peacock Gudgeon 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 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: Aggressive fish may bully and stress shy, slow-moving species. Hyperactive swimmers can stress shy, slow-moving species through constant motion.
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 Malawi Hawk (7.8–8.6) and Peacock Gudgeon (6.5–7.5) do not overlap, making it impossible to satisfy both species simultaneously.
For general hardness, the shared comfort zone is 10–10 dGH. Regular testing will ensure conditions stay within this range.
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Tank Setup
To house Malawi Hawk and Peacock Gudgeon together, plan for an aquarium of at least 475 litres with a minimum length of 180 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), Plants - Densely covered, Smooth Gravel (Sensitive Barbels). 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 Malawi Hawk and Peacock Gudgeon.
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Frequently Asked Questions
Can Malawi Hawk and Peacock Gudgeon live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Malawi Hawk and Peacock Gudgeon need?
A minimum of 475 litres (tank length at least 180 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 Malawi Hawk and Peacock Gudgeon 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 Malawi Hawk or Peacock Gudgeon aggressive?
Malawi Hawk is semi-aggressive (7/10) and Peacock Gudgeon is peaceful (2/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Malawi Hawk and Peacock Gudgeon need?
Their pH requirements do not overlap. Malawi Hawk prefers 7.8–8.6, while Peacock Gudgeon needs 6.5–7.5. This makes them incompatible in the same water chemistry.
How do I manage Malawi Hawk's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Malawi Hawk 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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