Can Siamese fighting fish Live With Cardinal tetra?

Detailed assessment

Both Siamese fighting fish and Cardinal tetra share a comfortable temperature range of 23–29°C (Siamese fighting fish prefers 22–30°C, Cardinal tetra prefers 23–29°C). Their pH ranges overlap well at 6–7.5, so water chemistry is compatible. Siamese fighting fish is moderately assertive (temperament score 5 out of 5) but generally tolerates peaceful tankmates like Cardinal tetra (score 1) when given enough space and cover. Overall, these two species can coexist peacefully in a well-maintained community tank with appropriate space.