Bloodfin tetra vs Flag tetra: can they live together?

Verdict: Compatible

Both are comfortable at 22–28°C (72–82°F).
A pH of 6.0–7.5 suits both.
Minimum tank for the pair: 75 L (20 US gal)

Side by side

	Bloodfin tetra	Flag tetra
Adult size	5.5 cm (2.2 in)	3.4 cm (1.3 in)
Minimum tank	75 L (20 US gal)	55 L (15 US gal)
Temperature	18–28°C (64–82°F)	22–28°C (72–82°F)
pH	6.0–8.0	5.5–7.5
Hardness	10–30 dGH (178–535 ppm)	5–15 dGH (89–268 ppm)
Temperament	Peaceful	Peaceful
Community tank	Excellent	Good
Care level	Easy	Moderate
Diet	Omnivore	Omnivore