Garnet tetra vs Slim betta: can they live together?

Verdict: With caution

The Slim betta can be semi-aggressive or nip fins.
The Slim betta grows about twice as long as the Garnet tetra; watch for bullying or predation.
Their preferred pH ranges don't overlap.
Both are comfortable at 24–27°C (75–81°F).
Minimum tank for the pair: 75 L (20 US gal)

Side by side

	Garnet tetra	Slim betta
Adult size	5 cm (2 in)	10 cm (3.9 in)
Minimum tank	55 L (15 US gal)	75 L (20 US gal)
Temperature	23–27°C (73–81°F)	24–30°C (75–86°F)
pH	5.0–6.0	6.5–7.5
Hardness	5–12 dGH (89–214 ppm)	5–15 dGH (89–268 ppm)
Temperament	Peaceful	Semi-aggressive
Community tank	Excellent	Good
Care level	–	Easy
Diet	Omnivore	Omnivore