Cardinal Tetra
The Cardinal Tetra (Paracheirodon axelrodi) is a small, docile species of tetra native to the Amazon River in South America. These fish are generally hardy, and make a great species for beginners and advanced keepers alike.
Minimum Tank Size: 10 Gallons
Maximum Fish Size: 1.5″
Water Temperature: 75F – 85F
Ideal pH: 5.0 – 6.5
Water Hardness: 2 – 10 dGH
Temperament: Schooling species, peaceful. May be timid in too small of a school.
| Key Care Notes |
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| Unless experienced with fish-in cycling, we always suggest cycling an aquarium BEFORE adding fish. Adding fish to a fresh, un-cycled aquarium can kill them rapidly. We offer free water testing at our physical location, and advice via email or call. |
FAQ
What is the ideal water temperature for Cardinal Tetras?
The ideal water temperature for Cardinal Tetras is between 75F and 85F.
How many Cardinal Tetras should I keep together?
Cardinal Tetras are schooling fish and should be kept in groups of at least six to ensure they feel secure and display natural behavior.
Can Cardinal Tetras live in a tank with other fish?
Yes, Cardinal Tetras are peaceful and can coexist with other non-aggressive species. Avoid keeping them with very active or aggressive fish.
Brian Young –
I bought these tetras for my 10-gallon tank and they’ve been thriving for three months. The water parameters are stable and they swim in beautiful schools. Easy to care for and very active in the tank.
Alan Marshall –
The fish are colorful and calm. I kept them with some neon tetras and they get along well. I made sure to cycle the tank first, which made a big difference in their health.
Bella Johnston –
Great addition to my community tank. They stay active and don’t stress other fish. I’ve maintained the pH and temperature as recommended and they’ve never shown signs of illness.