(C) Cardinal Tetra (Paracheirodon axelrodi)

Description

Cardinal Tetra (Paracheirodon axelrodi)
📌 Basic Info

Scientific Name: Paracheirodon axelrodi

Size: Up to 2 inches (5 cm)

Lifespan: 4–6 years

Tank Zone: Middle swimmers

🌊 Water Parameters

TDS (Total Dissolved Solids): 80 – 150 ppm

pH: 5.0 – 6.5 (soft & acidic)

Temperature: 24°C – 28°C (75°F – 82°F)

Water Type: Soft, slightly acidic, clean water

🐟 Characteristics

Peaceful, schooling fish with a bright blue stripe and full red belly (red runs from head to tail, unlike Neon Tetras).

Active swimmers, thrive in planted tanks.

Shy when alone but very confident in groups.

🍽️ Food

Type: Omnivorous

Diet: Micro-pellets, flakes, frozen/live foods (daphnia, brine shrimp, bloodworms)

Feeding Frequency: 1–2 times daily in small amounts

🛠️ Maintenance

Weekly water change: 20–30%

Needs stable water (very sensitive to sudden changes)

Prefers heavily planted tanks with driftwood & shaded areas

Gentle filtration, dim lighting recommended

👥 Social Behavior

Minimum Group Size: 8–10 (the bigger the group, the healthier they are)

Tank Mates: Peaceful species – rasboras, small tetras, guppies, mollies, corydoras, dwarf gouramis, shrimps, and snails

Avoid: Aggressive fish (bettas, barbs, large cichlids)

✅ Do’s

Keep in larger groups to reduce stress

Provide soft, acidic water conditions

Add plants, roots, or driftwood for hiding spots

❌ Don’ts

Don’t keep in hard, alkaline water

Don’t keep less than 6–8 fish (they get stressed)

Don’t add aggressive or fin-nipping tank mates

⭐ Quick Tips

Cardinal Tetras are more sensitive than Neon Tetras

Ideal for planted community aquariums

Best for hobbyists with some aquarium experience