Can Black Phantom Tetra and Bleeding Heart Tetra Live Together?
Keeping Black Phantom Tetra and Bleeding Heart Tetra together is possible but requires caution due to potential behavioral clashes. Provide a spacious tank of at least 110 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 Black Phantom Tetra and Bleeding Heart Tetra?
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
Both Black Phantom Tetra and Bleeding Heart Tetra are peaceful species with an aggression score of 2/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.
Black Phantom Tetra and Bleeding Heart Tetra both frequent the 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.
Additional behavioural considerations to keep in mind: Hyperactive swimmers can stress shy, slow-moving species through constant motion.
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. Keep fin nippers in larger groups to distribute nipping behaviour among conspecifics rather than tank mates.
Water Parameters
The safe temperature window for both species falls between 22°C and 28°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.
Both fish can tolerate a pH between 5.5 and 7.2. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 2–15 dGH. Regular testing will ensure conditions stay within this range.
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Tank Setup
To house Black Phantom Tetra and Bleeding Heart Tetra together, plan for an aquarium of at least 110 litres with a minimum length of 80 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 - Densely covered, Plants - Floating, Leaf Litter/Blackwater, Driftwood (Digestion/Hiding). Meeting these requirements will help both species thrive.
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 Black Phantom Tetra and Bleeding Heart Tetra.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
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Frequently Asked Questions
Can Black Phantom Tetra and Bleeding Heart Tetra live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 110 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Black Phantom Tetra and Bleeding Heart Tetra need?
A minimum of 110 litres (tank length at least 80 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 Black Phantom Tetra and Bleeding Heart Tetra together?
Keep the aquarium between 22°C and 28°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.
Are Black Phantom Tetra or Bleeding Heart Tetra aggressive?
Black Phantom Tetra is peaceful (2/10) and Bleeding Heart Tetra is peaceful (2/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Black Phantom Tetra and Bleeding Heart Tetra need?
Both species overlap in the 5.5–7.2 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
Will Bleeding Heart Tetra nip Black Phantom Tetra's fins?
Bleeding Heart Tetra is a known fin nipper. If Black Phantom Tetra has long or flowing fins, there is a real risk of fin damage. Keeping Bleeding Heart Tetra in a larger group can help redirect nipping behaviour toward conspecifics.
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