Red rainbowfish vs Mountain rainbowfish: can they live together?

Verdict: With caution

Their temperature ranges only just meet, at 22°C (72°F).
A pH of 7.0–7.2 suits both.
Minimum tank for the pair: 210 L (55 US gal)

Side by side

	Red rainbowfish	Mountain rainbowfish
Adult size	12 cm (4.7 in)	10 cm (3.9 in)
Minimum tank	150 L (40 US gal)	210 L (55 US gal)
Temperature	22–25°C (72–77°F)	18–22°C (64–72°F)
pH	7.0–8.0	6.5–7.2
Hardness	9–19 dGH (161–339 ppm)	–
Temperament	Peaceful	Peaceful
Community tank	Good	With caution
Care level	Easy	Easy
Diet	Omnivore	Omnivore