Can Dojo Loach (Weather Loach) and Swordtail Live Together?

🟢Ideal Tank Mates

Yes, Dojo Loach (Weather Loach) and Swordtail are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. They occupy different areas of the water column, which reduces competition for space. A minimum tank size of 240 litres is recommended.


At a Glance

Dojo Loach (Weather Loach)

Misgurnus anguillicaudatus

Swordtail

Xiphophorus hellerii

🐠Family Group
Dojo Loach (Weather Loach)
Loaches
Swordtail
Livebearers
Temperament
Dojo Loach (Weather Loach)
Peaceful (2/10)
Swordtail
Mostly Peaceful (4/10)
Temperature
✓ Compatible
Dojo Loach (Weather Loach)
10–24°C
Swordtail
21–28°C
pH Range
✓ Compatible
Dojo Loach (Weather Loach)
6.5–8
Swordtail
7–8.3
Hardness (dGH)
✓ Compatible
Dojo Loach (Weather Loach)
5–15
Swordtail
12–30
Water Type
✓ Compatible
Dojo Loach (Weather Loach)
Freshwater Only
Swordtail
Brackish Tolerant
Flow Preference
✓ Compatible
Dojo Loach (Weather Loach)
Moderate
Swordtail
Moderate
Min Tank Volume
Combined: 240 L
Dojo Loach (Weather Loach)
200 L
Swordtail
110 L
Swimming Level
✓ Different zones
Dojo Loach (Weather Loach)
Bottom
Swordtail
TopMiddle
🏷️Behavior Tags
Dojo Loach (Weather Loach)
Digger (Disturbs Substrate)Jumper (Lid Required)Hyperactive / Fast SwimmerSnail EaterPlant Destroyer
Swordtail
Hyperactive / Fast SwimmerJumper (Lid Required)Fry Predator

Behaviour & Temperament

Dojo Loach (Weather Loach) is a peaceful species (2/10), while Swordtail is generally mild-mannered (4/10). This modest difference means Swordtail may occasionally assert dominance over Dojo Loach (Weather Loach).

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

Worth noting: Dojo Loach (Weather Loach) is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 21°C and 24°C. Aim for the midpoint of this range (around 22.5°C) for optimal comfort.

Both fish can tolerate a pH between 7 and 8. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 12–15 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.

Tank Setup

To house Dojo Loach (Weather Loach) and Swordtail together, plan for an aquarium of at least 240 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.

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. Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Dojo Loach (Weather Loach) is a plant destroyer, which conflicts with Swordtail's requirement for live plants. Compromise where possible or prioritise the more critical need.

Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.

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Frequently Asked Questions

Can Dojo Loach (Weather Loach) and Swordtail live together?

Yes. Dojo Loach (Weather Loach) and Swordtail are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.

What size tank do Dojo Loach (Weather Loach) and Swordtail need?

A minimum of 240 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 Dojo Loach (Weather Loach) and Swordtail together?

Keep the aquarium between 21°C and 24°C. A target of around 22.5°C sits comfortably within both species' preferred ranges.

Are Dojo Loach (Weather Loach) or Swordtail aggressive?

Dojo Loach (Weather Loach) is peaceful (2/10) and Swordtail is generally mild-mannered (4/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Dojo Loach (Weather Loach) and Swordtail need?

Both species overlap in the 7–8 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.


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