Garnet tetra vs Northern trout gudgeon: can they live together?

Verdict: Not recommended

The Northern trout gudgeon can be semi-aggressive or nip fins.
An adult Northern trout gudgeon is about 4 times the length of a Garnet tetra and may eat it.
Both are comfortable at 24–26°C (75–79°F).
A pH of 6.0 suits both.

Side by side

	Garnet tetra	Northern trout gudgeon
Adult size	5 cm (2 in)	17.5 cm (6.9 in)
Minimum tank	55 L (15 US gal)	150 L (40 US gal)
Temperature	23–27°C (73–81°F)	24–26°C (75–79°F)
pH	5.0–6.0	6.0–7.8
Hardness	5–12 dGH (89–214 ppm)	–
Temperament	Peaceful	Semi-aggressive
Community tank	Excellent	Good
Care level	–	Easy
Diet	Omnivore	Omnivore