Can Figure 8 Puffer (Brackish) and Uaru Live Together?
Figure 8 Puffer (Brackish) and Uaru are not recommended as tank mates due to incompatible water types and conflicting pH requirements and incompatible hardness ranges. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.
At a Glance
Behaviour & Temperament
Figure 8 Puffer (Brackish) is a semi-aggressive species (8/10), while Uaru is generally mild-mannered (4/10). This notable difference means Figure 8 Puffer (Brackish) may occasionally assert dominance over Uaru.
Figure 8 Puffer (Brackish) and Uaru 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: Aggressive fish may bully and stress shy, slow-moving species. Hyperactive swimmers can stress shy, slow-moving species through constant motion.
Water Parameters
The safe temperature window for both species falls between 27°C and 28°C. Aim for the midpoint of this range (around 27.5°C) for optimal comfort.
The pH requirements of Figure 8 Puffer (Brackish) (7.5–8.5) and Uaru (5–7) do not overlap, making it impossible to satisfy both species simultaneously.
Hardness requirements are incompatible: Figure 8 Puffer (Brackish) needs 10–25 dGH while Uaru requires 1–8 dGH.
Crucially, these species require different water types — one needs freshwater while the other requires brackish conditions. This is a hard barrier to keeping them together. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Figure 8 Puffer (Brackish) and Uaru together, plan for an aquarium of at least 480 litres with a minimum length of 150 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), Shells (Breeding/Hiding), 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.
Find the right tank equipment
Browse tanks, décor, and equipment suited for this setup.
Frequently Asked Questions
Can Figure 8 Puffer (Brackish) and Uaru live together?▾
No. This combination is not recommended. Key incompatibilities — such as different water type needs — make cohabitation unsafe.
What size tank do Figure 8 Puffer (Brackish) and Uaru need?▾
A minimum of 480 litres (tank length at least 150 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 Figure 8 Puffer (Brackish) and Uaru together?▾
Keep the aquarium between 27°C and 28°C. A target of around 27.5°C sits comfortably within both species' preferred ranges.
Are Figure 8 Puffer (Brackish) or Uaru aggressive?▾
Figure 8 Puffer (Brackish) is semi-aggressive (8/10) and Uaru is generally mild-mannered (4/10). The gap in aggression levels means the calmer fish may experience stress from the more assertive one.
What pH do Figure 8 Puffer (Brackish) and Uaru need?▾
Their pH requirements do not overlap. Figure 8 Puffer (Brackish) prefers 7.5–8.5, while Uaru needs 5–7. This makes them incompatible in the same water chemistry.
Will Figure 8 Puffer (Brackish) nip Uaru's fins?▾
Figure 8 Puffer (Brackish) is a known fin nipper. If Uaru has long or flowing fins, there is a real risk of fin damage. Keeping Figure 8 Puffer (Brackish) in a larger group can help redirect nipping behaviour toward conspecifics.
How do I manage Figure 8 Puffer (Brackish)'s territorial behaviour?▾
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Figure 8 Puffer (Brackish) 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.
Related Comparisons
Figure 8 Puffer (Brackish) & Green Spotted Puffer (Brackish)
·
Figure 8 Puffer (Brackish) & Fahaka Puffer
·
Figure 8 Puffer (Brackish) & Mbu Puffer
·
Figure 8 Puffer (Brackish) & Dwarf Pea Puffer
·
Figure 8 Puffer (Brackish) & Amazon Puffer
·
Figure 8 Puffer (Brackish) & African Jewel Cichlid
·
Uaru & Bolivian Ram
·
Uaru & Discus
·
Uaru & German Blue Ram
·
Uaru & Keyhole Cichlid
·
Uaru & Agassiz's Dwarf Cichlid
·
Uaru & Cockatoo Dwarf Cichlid
·