Can Clown Killifish and Pearl Gourami Live Together?
Keeping Clown Killifish and Pearl Gourami together is possible but requires caution due to potential behavioral clashes. Provide a spacious tank of at least 132 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Behaviour & Temperament
Clown Killifish is a peaceful species (2/10), while Pearl Gourami is generally mild-mannered (3/10). This modest difference means Pearl Gourami may occasionally assert dominance over Clown Killifish.
Clown Killifish and Pearl Gourami both frequent the Top (Surface) 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: Clown Killifish is a known jumper, so a tight-fitting lid is essential.
To improve the chances of a peaceful coexistence in this community tank: 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 24°C and 27°C. Aim for the midpoint of this range (around 25.5°C) for optimal comfort.
Both fish can tolerate a pH between 5.5 and 7. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 2–8 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Clown Killifish and Pearl Gourami together, plan for an aquarium of at least 132 litres with a minimum length of 90 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: Plants - Floating, Plants - Densely covered, Leaf Litter/Blackwater, Plants - lighly 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.
Frequently Asked Questions
Can Clown Killifish and Pearl Gourami live together?▾
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 132 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Clown Killifish and Pearl Gourami need?▾
A minimum of 132 litres (tank length at least 90 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 Clown Killifish and Pearl Gourami together?▾
Keep the aquarium between 24°C and 27°C. A target of around 25.5°C sits comfortably within both species' preferred ranges.
Are Clown Killifish or Pearl Gourami aggressive?▾
Clown Killifish is peaceful (2/10) and Pearl Gourami is generally mild-mannered (3/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Clown Killifish and Pearl Gourami need?▾
Both species overlap in the 5.5–7 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
Related Comparisons
Clown Killifish & Gardner's Killifish
·
Clown Killifish & Japanese Ricefish (Medaka)
·
Clown Killifish & Rachov's Killifish (Annual)
·
Clown Killifish & Amazon Leaf Fish
·
Clown Killifish & Beckford's Pencilfish
·
Clown Killifish & Chili Rasbora
·
Pearl Gourami & Betta (Siamese Fighting Fish)
·
Pearl Gourami & Dwarf Gourami
·
Pearl Gourami & Honey Gourami
·
Pearl Gourami & Sparkling Gourami
·
Pearl Gourami & Leopard Bushfish (Ctenopoma)
·
Pearl Gourami & Paradise Fish
·