Can Arrowhead Puffer and Uaru Live Together?
Keeping Arrowhead Puffer and Uaru together is possible but requires caution due to differing aggression levels and potential behavioral clashes. Provide a spacious tank of at least 400 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 Arrowhead Puffer and Uaru?
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.
Shared setup supplies
We may earn from qualifying purchases
Behaviour & Temperament
Arrowhead Puffer is a highly aggressive species (10/10), while Uaru is generally mild-mannered (4/10). This notable difference means Arrowhead Puffer may occasionally assert dominance over Uaru.
Large aggression gap (6 points) between Arrowhead Puffer and Uaru increases stress risk for the more peaceful fish.
Arrowhead Puffer and Uaru both frequent the 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.
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.
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.
Both fish can tolerate a pH between 6.5 and 7. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 5–8 dGH. Regular testing will ensure conditions stay within this range.
Water care products
We may earn from qualifying purchases
Tank Setup
To house Arrowhead Puffer and Uaru together, plan for an aquarium of at least 400 litres with a minimum length of 150 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: Sand (Sifters), 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.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Arrowhead Puffer and Uaru.
Feeding products to consider
We may earn from qualifying purchases
.webp?2026-04-25T14%3A35%3A38.022Z)
Frequently Asked Questions
Can Arrowhead Puffer and Uaru live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 400 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Arrowhead Puffer and Uaru need?
A minimum of 400 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 Arrowhead Puffer 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 Arrowhead Puffer or Uaru aggressive?
Arrowhead Puffer is highly aggressive (10/10) 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 Arrowhead Puffer and Uaru need?
Both species overlap in the 6.5–7 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
Related Comparisons
Arrowhead Puffer & Fahaka Puffer
·
Arrowhead Puffer & Dwarf Pea Puffer
·
Arrowhead Puffer & Figure 8 Puffer (Brackish)
·
Arrowhead Puffer & Green Spotted Puffer (Brackish)
·
Arrowhead Puffer & Amazon Puffer
·
Arrowhead Puffer & Mbu Puffer
·
Uaru & Bolivian Ram
·
Uaru & Discus
·
Uaru & German Blue Ram
·
Uaru & Keyhole Cichlid
·
Uaru & Agassiz's Dwarf Cichlid
·
Uaru & Bahia Red
·