Can chili rasboras and male bettas live together?

Yes

Chili rasboras and male bettas can share a tank. Their water needs overlap and neither is known to bother the other.

Chili rasbora Betta (male)

Why

  • Their temperature and pH ranges overlap comfortably, and neither is known to nip, chase or eat the other.

What each one needs

Chili rasboraBetta (male)Both
Temperature68–82°F (20–28°C)76–82°F (24–28°C)76–82°F (24–28°C)
pH4.0–7.06.5–7.56.5–7.0
Minimum tank5 gal (19 L)5 gal (19 L)5 gal (19 L)
Keep at least61
Adult size0.7 in (1.8 cm)2.5 in (6.4 cm)

The smallest tank for both

A 5 gallons (19 L) tank holds 6 chili rasboras and 1 betta (male) at about 76% of its stocking limit, which leaves room for more.

Other tank mates for chili rasboras

Other tank mates for male bettas