Can Siamese fighting fish Live With Guppy?

Detailed assessment

Both Siamese fighting fish and Guppy share a comfortable temperature range of 24–28°C (Siamese fighting fish prefers 24–30°C, Guppy prefers 22–28°C). Their pH ranges overlap well at 7–8, so water chemistry is compatible. Siamese fighting fish is moderately assertive (temperament score 5 out of 10) but generally tolerates peaceful tankmates like Guppy (score 1) when given enough space and cover. Overall, these two species can coexist peacefully in a well-maintained community tank with appropriate space.