Can Port Acara and White Top Hara (Gallireya Reef) Live Together?
Port Acara and White Top Hara (Gallireya Reef) 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 Port Acara and White Top Hara (Gallireya Reef)?
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
Port Acara is a moderately assertive species (5/10), while White Top Hara (Gallireya Reef) is semi-aggressive (7/10). This modest difference means White Top Hara (Gallireya Reef) may occasionally assert dominance over Port Acara.
Port Acara and White Top Hara (Gallireya Reef) both frequent the Middle (Open Water) and Bottom (Substrate) 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: Two territorial species may clash over territory, especially in smaller tanks.
Water Parameters
The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.
The pH requirements of Port Acara (6–7.5) and White Top Hara (Gallireya Reef) (7.8–8.6) 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 Port Acara and White Top Hara (Gallireya Reef) together, plan for an aquarium of at least 285 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), Driftwood (Digestion/Hiding), Established Algae (Otocinclus). 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.
Why This Pairing Usually Fails in Practice
Port Acara and White Top Hara (Gallireya Reef) 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 Port Acara and White Top Hara (Gallireya Reef).
90 Gallon Standard
125 Gallon Standard
150 Gallon High
180 Gallon Standard
350 Liter (120cm Deep)
450 Liter (150cm Standard)
Frequently Asked Questions
Can Port Acara and White Top Hara (Gallireya Reef) live together?
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Port Acara and White Top Hara (Gallireya Reef) need?
A minimum of 285 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 Port Acara and White Top Hara (Gallireya Reef) together?
Keep the aquarium between 24°C and 28°C. A target of around 26.0°C sits comfortably within both species' preferred ranges.
Are Port Acara or White Top Hara (Gallireya Reef) aggressive?
Port Acara is moderately assertive (5/10) and White Top Hara (Gallireya Reef) is semi-aggressive (7/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Port Acara and White Top Hara (Gallireya Reef) need?
Their pH requirements do not overlap. Port Acara prefers 6–7.5, while White Top Hara (Gallireya Reef) needs 7.8–8.6. This makes them incompatible in the same water chemistry.
How do I manage Port Acara's territorial behaviour?
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Port Acara 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.
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- May 4, 2026
- Last updated
- May 4, 2026
- Issues or corrections?
- Contact the editorial team
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