Can Clown Loach and Golden Wonder Killifish Live Together?
Keeping Clown Loach and Golden Wonder Killifish together is possible but requires caution due to differing aggression levels. Provide a spacious tank of at least 600 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Behaviour & Temperament
Clown Loach is a peaceful species (2/10), while Golden Wonder Killifish is moderately assertive (6/10). This notable difference means Golden Wonder Killifish may occasionally assert dominance over Clown Loach.
In terms of spatial distribution, Clown Loach prefers the Bottom (Substrate) zone, whereas Golden Wonder Killifish occupies the Top (Surface) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.
Worth noting: Clown Loach is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Golden Wonder 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 25°C and 28°C. Aim for the midpoint of this range (around 26.5°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 5–12 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Clown Loach and Golden Wonder Killifish together, plan for an aquarium of at least 600 litres with a minimum length of 150 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), Plants - Floating. 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
Browse tanks, décor, and equipment suited for this setup.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Clown Loach and Golden Wonder Killifish.
Frequently Asked Questions
Can Clown Loach and Golden Wonder Killifish live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 600 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Clown Loach and Golden Wonder Killifish need?
A minimum of 600 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 Clown Loach and Golden Wonder Killifish together?
Keep the aquarium between 25°C and 28°C. A target of around 26.5°C sits comfortably within both species' preferred ranges.
Are Clown Loach or Golden Wonder Killifish aggressive?
Clown Loach is peaceful (2/10) and Golden Wonder Killifish is moderately assertive (6/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Clown Loach and Golden Wonder Killifish 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.
Does Clown Loach being nocturnal affect compatibility?
Clown Loach 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 Clown Loach during evening hours.
Related Comparisons
Clown Loach & Dwarf Chain Loach
·
Clown Loach & Yoyo Loach
·
Clown Loach & Zebra Loach
·
Clown Loach & Dojo Loach (Weather Loach)
·
Clown Loach & Kuhli Loach
·
Clown Loach & Reticulated Hillstream Loach
·
Golden Wonder Killifish & Florida Flagfish
·
Golden Wonder Killifish & Gardner's Killifish
·
Golden Wonder Killifish & Japanese Ricefish (Medaka)
·
Golden Wonder Killifish & Clown Killifish
·
Golden Wonder Killifish & African Butterfly Fish
·
Golden Wonder Killifish & Betta (Siamese Fighting Fish)
·