Red rainbowfish vs Bleeding-heart tetra: can they live together?

Verdict: With caution

The Red rainbowfish grows about twice as long as the Bleeding-heart tetra; watch for bullying or predation.
Both are comfortable at 23–25°C (73–77°F).
A pH of 7.0–7.2 suits both.
Minimum tank for the pair: 150 L (40 US gal)

Side by side

	Red rainbowfish	Bleeding-heart tetra
Adult size	12 cm (4.7 in)	6 cm (2.4 in)
Minimum tank	150 L (40 US gal)	75 L (20 US gal)
Temperature	22–25°C (72–77°F)	23–28°C (73–82°F)
pH	7.0–8.0	5.6–7.2
Hardness	9–19 dGH (161–339 ppm)	3–12 dGH (54–214 ppm)
Temperament	Peaceful	Peaceful
Community tank	Good	Good
Care level	Easy	Easy
Diet	Omnivore	Omnivore