Compatibility brief
Can Discus live with Glowlight Tetra?
Caution. Check the issues below before buying.
Discus + Glowlight Tetra: Narrow temperature overlap. Discus and Glowlight Tetra have only a narrow shared temperature range. Maintaining stable water temperature will be important. Outcomes still depend on your tank shape, maintenance routine, and individual fish.
Compatibility score
Profile confidence: medium
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
200L
Combined minimum footprint reference for these two species: about 200L (larger active fish often want more length).
Assessment details
Compatible temperaments
Both Discus and Glowlight Tetra share a peaceful temperament.
Narrow temperature overlap
Top issueDiscus and Glowlight Tetra have only a narrow shared temperature range. Maintaining stable water temperature will be important.
“Discus and Glowlight Tetra have only a narrow shared…”
Narrow temperature overlap
Next steps
Concrete changes, not "research more" filler.
- •Discus should be kept in a group of at least 4 for best health and behaviour.
- •Glowlight Tetra should be kept in a group of at least 6 for best health and behaviour.
Try instead
- →Discus should be kept in a group of at least 4 for best health and behaviour.
- →Glowlight Tetra should be kept in a group of at least 6 for best health and behaviour.
- Seriously Fish. Symphysodon aequifasciatus (discus complex representative)
Primary stand-in: Seriously Fish page for a common discus taxon. Trade 'discus' is often a mix of lineages, strains, and hybrids. Match your bag label, not a single name field here.
- FishBase. Symphysodon aequifasciatus
Taxonomy, distribution, and typical max length in natural/wild contexts (cross-check to aquarium import lines).
- Wikipedia. Discus (fish)
Encyclopaedia overview; use specialist aquarium sources for your stock's real temperature/pH/footprint needs.
- Seriously Fish. Hemigrammus erythrozonus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Hemigrammus erythrozonus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Hemigrammus erythrozonus
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
Try this next
Build the full stocking list with Discus + Glowlight Tetra
Plan further
Try both species in the full-stock tank check, or open either fish profile for mates lists. Methodology explains how verdicts are produced.
Individual fish vary in personality. Fishori uses conservative hobby rules. Observe any new introduction closely, feed thoughtfully, and keep a quarantine or backup plan. This is not veterinary advice.
Profile data confidence: high. Based on multiple reputable aquarium care sources with strong agreement.