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Some sources say that they can live upto 4 years. Meanwhile, the other say that they can only live for 1 year. If the cardinal tetras sold in store were caught from the nature, they would already have spent quite a long time out of their lifespan. I mean, they were kind of old already when we bought them, so they would not survive for so long (less than 1 year for the worst). I assumed all the requirements and living conditions for them were met.
Any thoughts on that? How long can you keep them in your aquarium?
Any thoughts on that? How long can you keep them in your aquarium?