The glowlight tetra (Hemigrammus erythrozonus) is a peaceful fish that grows to about 1.5 inches and spends its time in mid-water. Keep at least 6 together, in a tank of 10 gallons or more, at 74–82°F and pH 5.8–7.5.
10 galsmallest tank
1.5″adult size
74–82°Ftemperature
5.8–7.5pH
6+group size
Peacefultemperament
Good tankmates
Avoid
- ✕White cloud mountain minnow: Glowlight tetra and White cloud mountain minnow need different temperatures (74–82°F vs 60–72°F).
- ✕Rosy barb: Glowlight tetra and Rosy barb need different temperatures (74–82°F vs 64–72°F).
- ✕Paradise fish: Paradise fish is aggressive and best kept alone.
- ✕Angelfish: Angelfish grows big enough to eat Glowlight tetra.
- ✕Convict cichlid: Convict cichlid is aggressive and best kept alone.
- ✕Oscar: Oscar is aggressive and best kept alone.
- ✕Fancy goldfish: Glowlight tetra and Fancy goldfish need different temperatures (74–82°F vs 65–72°F).
- ✕Comet goldfish: Glowlight tetra and Comet goldfish need different temperatures (74–82°F vs 60–72°F).
From TankCoach's own species data: common hobby guidance for adults, rounded. Individual fish vary. Not veterinary advice.