Glowlight Tetra
Hemigrammus erythrozonus
Quick Facts
- Adult Size
- 1.5 in
- Minimum Tank
- 15 gal
- Recommended Tank
- 20 gal+
- Temperature
- 72–82°F
- pH
- 6–7.5
- Hardness
- 2–12 dGH (Moderate)
- Temperament
- peaceful
- Schooling
- Groups of 6+
- Lifespan
- 3–5 yrs
- Diet
- omnivore
- Care Level
- easy
Overview
A gentle, glowing orange-striped tetra that suits almost any peaceful community. Colour deepens in a planted, dimly lit tank.
Tank Requirements
- Minimum footprint: 15 gallons; a 20+ gallon tank gives real swimming room.
- Preferred swimming zone: middle of the water column.
- Social — keep a group of at least 6.
- Care level: easy.
Water Parameters
- Temperature: 72–82°F
- pH: 6–7.5
- Hardness: 2–12 dGH (Moderate)
Stable parameters matter more than perfect ones — aim for consistency before chasing an exact number.
Temperament
peaceful
schoolingpeacefulmidwatercommunity
Feeding
An omnivore — offer a staple flake or pellet plus regular frozen or live foods (daphnia, bloodworm, brine shrimp) and some vegetable matter for balance.
Tank Mates
Fish to Avoid
- Angelfish — Occasional chasing or fin nipping is possible.
- Yoyo Loach — Occasional chasing or fin nipping is possible.
- Electric Blue Acara — Occasional chasing or fin nipping is possible.
- Redtail Shark — Occasional chasing or fin nipping is possible.
Recommended Tank Sizes
Standard tanks at or above the recommended 20 gallons:
Stocking Considerations
- Start from a 15 gallon minimum and plan the full group size (6+) before you buy.
- Activity level is high, which affects how much of the tank it uses and how much it adds to the bioload.
- Zoning matters: this species lives mostly in the middle zone, so choose tank mates that occupy other levels.
Compatibility
Compatibility depends on tank size, water chemistry, temperament, and adult size. Run a full check against any species in our database.
Check Glowlight Tetra tank matesSources
- FishBase(Scientific Database, accessed 2026-09-20)
- SeriouslyFish(Specialist Publication, accessed 2026-09-20)
- Aquarium Forge editorial guidelines(Editorial Interpretation, accessed 2026-09-22)
Data reviewed: September 2026 · Data version: 2026.11
Editorial note: Minimum tank recommendations may vary by source and husbandry approach. Our figures synthesise the sources above for planning purposes.
Related Tools
Last reviewed: · Data version 2026.11