Bleeding-heart tetra vs Flag tetra: can they live together?

Verdict: Compatible

Both are comfortable at 23–28°C (73–82°F).
A pH of 5.6–7.2 suits both.
Minimum tank for the pair: 75 L (20 US gal)

Side by side

	Bleeding-heart tetra	Flag tetra
Adult size	6 cm (2.4 in)	3.4 cm (1.3 in)
Minimum tank	75 L (20 US gal)	55 L (15 US gal)
Temperature	23–28°C (73–82°F)	22–28°C (72–82°F)
pH	5.6–7.2	5.5–7.5
Hardness	3–12 dGH (54–214 ppm)	5–15 dGH (89–268 ppm)
Temperament	Peaceful	Peaceful
Community tank	Good	Good
Care level	Easy	Moderate
Diet	Omnivore	Omnivore