Cardinal Tetra — Fish Profile
Paracheirodon axelrodi
Quick Specs
| Adult Size: | 1.5" |
| Temperament: | peaceful |
| Care Level: | intermediate |
| Min Tank Size: | 10 gallons |
| Temperature: | 73-81°F |
| pH Range: | 5.0-7.0 |
| Diet: | omnivore |
| Origin: | South America (Orinoco and Negro Rivers) |
| Lifespan: | 5-10 years |
Overview
Cardinal Tetras are stunning schooling fish with a full-length iridescent blue stripe and vivid red lower body extending from head to tail. They look similar to neon tetras but the red extends the full length of the body. Best kept in groups of 6+ in blackwater-style tanks.
Care Guide for Cardinal Tetra
Tank Setup
Cardinal Tetra requires a minimum tank size of 10 gallons. Maintain water temperature between 73°F and 81°F, with a pH range of 5.0 to 7.0. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Cardinal Tetra with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Cardinal Tetra is a omnivore feeder. Provide a varied diet appropriate for omnivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as peaceful. Cardinal Tetra reaches an adult size of 1.5 inches and has a care level of intermediate. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Cardinal Tetra originates from South America (Orinoco and Negro Rivers) and has an expected lifespan of 5-10 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
🔴 Risky Tank Mates
Recommended for Cardinal Tetra
Ocean Nutrition Atison's Betta Food — $8.99Small floating pellets perfect for tetras