Can Australian Smelt and Banana Loach Live Together?

Possible with Caution

Keeping Australian Smelt and Banana Loach together is possible but requires caution due to potential behavioral clashes. Provide a spacious tank of at least 200 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.


At a Glance

Australian Smelt

Retropinna semoni

Banana Loach

Acantopsis choirorhynchos

🐠Family Group
Australian Smelt
Other
Banana Loach
Loaches
Temperament
Australian Smelt
Peaceful (1/10)
Banana Loach
Peaceful (2/10)
Temperature
✓ Compatible
Australian Smelt
15–24°C
Banana Loach
22–28°C
pH Range
✓ Compatible
Australian Smelt
6.5–8
Banana Loach
6–7.8
Hardness (dGH)
✓ Compatible
Australian Smelt
5–20
Banana Loach
2–15
Water Type
✓ Compatible
Australian Smelt
Brackish Tolerant
Banana Loach
Freshwater Only
Flow Preference
✓ Compatible
Australian Smelt
Moderate
Banana Loach
Moderate
Min Tank Volume
Combined: 200 L
Australian Smelt
75 L
Banana Loach
200 L
Swimming Level
✓ Different zones
Australian Smelt
TopMiddle
Banana Loach
Bottom
🏷️Behavior Tags
Australian Smelt
Hyperactive / Fast SwimmerShy / Slow Moving (Easily Stressed)Fry PredatorJumper (Lid Required)
Banana Loach
Digger (Disturbs Substrate)Shy / Slow Moving (Easily Stressed)Nocturnal
Stocking calculator

Can your tank handle Australian Smelt and Banana Loach?

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.

Australian Smelt
Banana Loach
Test both in my tank

Behaviour & Temperament

Australian Smelt is a peaceful species (1/10), while Banana Loach is peaceful (2/10). This modest difference means Banana Loach may occasionally assert dominance over Australian Smelt.

In terms of spatial distribution, Australian Smelt prefers the Top (Surface) and Middle (Open Water) zones, whereas Banana Loach occupies the Bottom (Substrate) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.

Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion.

Worth noting: Banana Loach is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, Australian Smelt 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 22°C and 24°C. Aim for the midpoint of this range (around 23.0°C) for optimal comfort.

Both fish can tolerate a pH between 6.5 and 7.8. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 5–15 dGH. Regular testing will ensure conditions stay within this range.

Tank Setup

To house Australian Smelt and Banana Loach together, plan for an aquarium of at least 200 litres with a minimum length of 120 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

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 - lighly covered, Smooth Gravel (Sensitive Barbels), Sand (Sifters). 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 Australian Smelt and Banana Loach.

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Frequently Asked Questions

Can Australian Smelt and Banana Loach live together?

They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 200 litres), plenty of hiding spots, and watch for signs of stress or aggression.

What size tank do Australian Smelt and Banana Loach need?

A minimum of 200 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 Australian Smelt and Banana Loach together?

Keep the aquarium between 22°C and 24°C. A target of around 23.0°C sits comfortably within both species' preferred ranges.

Are Australian Smelt or Banana Loach aggressive?

Australian Smelt is peaceful (1/10) and Banana Loach is peaceful (2/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Australian Smelt and Banana Loach need?

Both species overlap in the 6.5–7.8 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

Does Banana Loach being nocturnal affect compatibility?

Banana 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 Banana Loach during evening hours.


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