Can Flowerhorn Cichlid and Severum Live Together?
Keeping Flowerhorn Cichlid and Severum together is possible but requires caution due to differing aggression levels and potential behavioral clashes. Provide a spacious tank of at least 336 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Behaviour & Temperament
Flowerhorn Cichlid is a highly aggressive species (10/10), while Severum is moderately assertive (5/10). This notable difference means Flowerhorn Cichlid may occasionally assert dominance over Severum.
Flowerhorn Cichlid and Severum 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.
Additional behavioural considerations to keep in mind: Two territorial species may clash over territory, especially in smaller tanks.
To improve the chances of a peaceful coexistence in this community tank: Provide a significantly larger tank (at least 50% more volume than the minimum) to allow both Flowerhorn Cichlid and Severum to establish separate territories. Add plenty of line-of-sight breaks using driftwood, rocks, and dense planting to reduce territorial confrontations. A larger aquarium with ample hiding spots can help diffuse aggression and give the less dominant fish space to retreat.
Water Parameters
The safe temperature window for both species falls between 26°C and 29°C. Aim for the midpoint of this range (around 27.5°C) for optimal comfort.
Both fish can tolerate a pH between 7.4 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 9–15 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Flowerhorn Cichlid and Severum together, plan for an aquarium of at least 336 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.
Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.
Specific environmental needs for this combination include: Sand (Sifters), Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/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.
Find the right tank equipment
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Frequently Asked Questions
Can Flowerhorn Cichlid and Severum live together?▾
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 336 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Flowerhorn Cichlid and Severum need?▾
A minimum of 336 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 Flowerhorn Cichlid and Severum together?▾
Keep the aquarium between 26°C and 29°C. A target of around 27.5°C sits comfortably within both species' preferred ranges.
Are Flowerhorn Cichlid or Severum aggressive?▾
Flowerhorn Cichlid is highly aggressive (10/10) and Severum is moderately assertive (5/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Flowerhorn Cichlid and Severum need?▾
Both species overlap in the 7.4–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
How do I manage Flowerhorn Cichlid's territorial behaviour?▾
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Flowerhorn 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.
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