Cardinal Tetra XXL-3

The Cardinal Tetra is one of the most iconic freshwater aquarium fish, known for its vibrant neon blue stripe and deep red coloration running the full length of its body. These XXL specimens are larger, more developed fish with stronger colour and presence compared to standard juveniles.

Cardinal Tetras are peaceful schooling fish that truly shine when kept in groups, creating stunning movement and colour in planted aquariums.

At N8 Aquatics, our Cardinals are carefully quarantined and conditioned on high-quality foods, ensuring strong, healthy fish ready for your aquarium.

Species Snapshot

• Size Sold: 3.5 cm+ (XXL juveniles)
• Adult Size: 4–5 cm
• Tank Size: 60 L minimum (larger recommended)
• Temperament: Peaceful schooling fish
• Temperature: 24–30°C
• pH: 4.5 – 7.0
• Difficulty: Moderate

Key Information

• Scientific Name: Paracheirodon axelrodi
• Common Name: Cardinal Tetra
• Current Size: Approximately 3.5 cm+
• Adult Size: Up to 5 cm
• Temperament: Peaceful
• Difficulty Level: Moderate

Recommended Tank Setup

Cardinal Tetras thrive in planted aquariums that replicate soft, natural environments.

Recommended aquascape:

• dense plant coverage
• driftwood and leaf litter
• subdued lighting
• dark substrate

They display best colours in slightly dim environments.

Water Parameters

Cardinals prefer soft, stable water conditions.

• Temperature: 24–30°C
• pH: 4.5 – 7.0
• GH: 1 – 8 dGH
• Water Flow: Low to moderate

Diet

Cardinal Tetras are omnivores and benefit from a varied diet.

Recommended foods include:

• live brine shrimp (N8 Aquatics recommended)
• frozen foods
• micro pellets
• high-quality flakes

Compatibility

Suitable tankmates include:

• other small tetras
• dwarf cichlids
• Corydoras
• peaceful community fish

Avoid large or aggressive fish.

Behaviour

Cardinals are active schooling fish that feel most secure in groups of 6 or more. Larger groups create more natural behaviour and stronger colouration.

Why Buy From N8 Aquatics

• XXL premium-sized fish
• Carefully conditioned post-import
• Strong, healthy stock
• Fed high-quality diet including live foods

Pickup Information

N8 Aquatics currently operates as a local pickup-only breeder in Central Queensland.

Orders are collected by appointment after purchase confirmation.

Please ensure you are able to collect your fish before placing an order.

Important

All livestock sold by N8 Aquatics should be introduced to fully cycled aquariums suitable for the species being kept.

Please ensure your aquarium setup and tankmates are appropriate before purchasing.