Redtail splitfin vs Northern trout gudgeon: can they live together?

Verdict: With caution

  • The Northern trout gudgeon can be semi-aggressive or nip fins.
  • The Redtail splitfin can be semi-aggressive or nip fins.
  • The Northern trout gudgeon grows about twice as long as the Redtail splitfin; watch for bullying or predation.
  • Both are comfortable at 24–26°C (75–79°F).
  • A pH of 6.0–7.8 suits both.
  • Minimum tank for the pair: 150 L (40 US gal)

Side by side

Redtail splitfinNorthern trout gudgeon
Adult size6 cm (2.4 in)17.5 cm (6.9 in)
Minimum tank75 L (20 US gal)150 L (40 US gal)
Temperature15–32°C (59–90°F)24–26°C (75–79°F)
pH6.0–8.06.0–7.8
Hardness9–19 dGH (161–339 ppm)–
TemperamentSemi-aggressiveSemi-aggressive
Community tankGoodGood
Care levelEasyEasy
DietOmnivoreOmnivore

Species profiles