Slim betta vs Roundtail paradisefish: can they live together?

Verdict: With caution

  • The Roundtail paradisefish can be semi-aggressive or nip fins.
  • The Slim betta can be semi-aggressive or nip fins.
  • Both are comfortable at 24–26°C (75–79°F).
  • A pH of 6.5–7.5 suits both.
  • Minimum tank for the pair: 115 L (30 US gal)

Side by side

Slim bettaRoundtail paradisefish
Adult size10 cm (3.9 in)7 cm (2.8 in)
Minimum tank75 L (20 US gal)115 L (30 US gal)
Temperature24–30°C (75–86°F)16–26°C (61–79°F)
pH6.5–7.56.0–8.0
Hardness5–15 dGH (89–268 ppm)5–19 dGH (89–339 ppm)
TemperamentSemi-aggressiveSemi-aggressive
Community tankGood–
Care levelEasyEasy
DietOmnivoreCarnivore

Species profiles