Can Balloon Molly and Dojo Loach (Weather Loach) Live Together?
Keeping Balloon Molly and Dojo Loach (Weather Loach) together is possible but requires caution, though some care is needed. 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
Can your tank handle Balloon Molly and Dojo Loach (Weather 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.
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Behaviour & Temperament
Balloon Molly is a generally mild-mannered species (3/10), while Dojo Loach (Weather Loach) is peaceful (2/10). This modest difference means Balloon Molly may occasionally assert dominance over Dojo Loach (Weather Loach).
In terms of spatial distribution, Balloon Molly prefers the Top (Surface) and Middle (Open Water) zones, whereas Dojo Loach (Weather 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.
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 24°C and 24°C. Aim for the midpoint of this range (around 24.0°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.
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Tank Setup
To house Balloon Molly and Dojo Loach (Weather 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: Established Algae (Otocinclus), Plants - Densely covered, Sand (Sifters). 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 Balloon Molly's requirement for live plants. Compromise where possible or prioritise the more critical need.
Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Balloon Molly and Dojo Loach (Weather Loach).
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
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Frequently Asked Questions
Can Balloon Molly and Dojo Loach (Weather 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 Balloon Molly and Dojo Loach (Weather 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 Balloon Molly and Dojo Loach (Weather Loach) together?
Keep the aquarium between 24°C and 24°C. A target of around 24.0°C sits comfortably within both species' preferred ranges.
Are Balloon Molly or Dojo Loach (Weather Loach) aggressive?
Balloon Molly is generally mild-mannered (3/10) and Dojo Loach (Weather Loach) is peaceful (2/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Balloon Molly and Dojo Loach (Weather Loach) 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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