Lake Kutubu rainbowfish vs Northern trout gudgeon: can they live together?

Verdict: With caution

The Northern trout gudgeon can be semi-aggressive or nip fins.
Their temperature ranges only just meet, at 24°C (75°F).
A pH of 7.0–7.8 suits both.
Minimum tank for the pair: 210 L (55 US gal)

Side by side

	Lake Kutubu rainbowfish	Northern trout gudgeon
Adult size	10 cm (3.9 in)	17.5 cm (6.9 in)
Minimum tank	210 L (55 US gal)	150 L (40 US gal)
Temperature	20–24°C (68–75°F)	24–26°C (75–79°F)
pH	7.0–8.0	6.0–7.8
Hardness	9–12 dGH (161–214 ppm)	–
Temperament	Peaceful	Semi-aggressive
Community tank	Good	Good
Care level	Easy	Easy
Diet	Omnivore	Omnivore