Can Dickfeld's Julie and Filament Barb Live Together?
Dickfeld's Julie and Filament Barb are not recommended as tank mates due to conflicting pH requirements. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.
At a Glance
Can your tank handle Dickfeld's Julie and Filament Barb?
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.
Behaviour & Temperament
Dickfeld's Julie is a moderately assertive species (6/10), while Filament Barb is generally mild-mannered (4/10). This modest difference means Dickfeld's Julie may occasionally assert dominance over Filament Barb.
Dickfeld's Julie and Filament Barb both frequent the Bottom (Substrate) and Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.
Worth noting: Filament Barb is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 23°C and 26°C. Aim for the midpoint of this range (around 24.5°C) for optimal comfort.
The pH requirements of Dickfeld's Julie (8–9) and Filament Barb (6–7.5) do not overlap, making it impossible to satisfy both species simultaneously.
For general hardness, the shared comfort zone is 10–15 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Dickfeld's Julie and Filament Barb together, plan for an aquarium of at least 240 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.
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), Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/Hiding). 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.
Why This Pairing Usually Fails in Practice
Dickfeld's Julie and Filament Barb are the kind of pair that can look acceptable in a shop but become a maintenance problem at home. The main risk is not a single number in the chart; it is the way incompatible behavior, water needs, or pressure on space compounds over time once both fish are established in the same tank.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Dickfeld's Julie and Filament Barb.
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
180 Gallon Standard
240 Liter (120cm Standard)
Frequently Asked Questions
Can Dickfeld's Julie and Filament Barb live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Dickfeld's Julie and Filament Barb 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 Dickfeld's Julie and Filament Barb together?
Keep the aquarium between 23°C and 26°C. A target of around 24.5°C sits comfortably within both species' preferred ranges.
Are Dickfeld's Julie or Filament Barb aggressive?
Dickfeld's Julie is moderately assertive (6/10) and Filament Barb is generally mild-mannered (4/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Dickfeld's Julie and Filament Barb need?
Their pH requirements do not overlap. Dickfeld's Julie prefers 8–9, while Filament Barb needs 6–7.5. This makes them incompatible in the same water chemistry.
Will Filament Barb nip Dickfeld's Julie's fins?
Filament Barb is a known fin nipper. If Dickfeld's Julie has long or flowing fins, there is a real risk of fin damage. Keeping Filament Barb in a larger group can help redirect nipping behaviour toward conspecifics.
How do I manage Dickfeld's Julie's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Dickfeld's Julie space to claim a territory without encroaching on the other fish's area. Adding décor that divides the tank into distinct zones works especially well.
Shared setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 6, 2026
- Last updated
- May 6, 2026
- Issues or corrections?
- Contact the editorial team
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