Cardinal tetra
Paracheirodon axelrodi
Essential gear
- 45 cm+ long tank
- Filter
- Heater
- Thermometer
- Acidifying agent (optional)
- Net
Lifespan
4–6years
Water temperature
23–28°C
pH
5.5–7.0
Water column
Upper-mid level
Schools occupy mid-level space
Keep in groups
10+ fish
Large schools have more visual impact
Diet
Omnivore leaning carnivorous
Small pellets, flakes, frozen bloodworms, brine shrimp
Suggested habitat
Aim for 450 mm+ long tank with midground plant thickets and a foreground swim lane. Soft acidic water + tannin-leaching wood brings out the most vivid color.
Plates are husbandry references—not build plans or generator parameters. Check your own water, vessel, and stocking before you act.