TankStocking

Can Freshwater Angelfish live with Discus?

Yes — Freshwater Angelfish and Discus are a workable pairing in a suitable, cycled tank.

By the TankStocking team · methodology-driven, sourced from aquarium care references Data v2026.06 · last reviewed How we judge this →

The planner's verdict

Freshwater Angelfish + Discus

✓ Good starter plan

1× Freshwater Angelfish, 5× Discus

The engine clears this pairing — a workable starting point in a cycled, planted tank.

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Freshwater Angelfish vs Discus: key facts

A neutral, side-by-side look at each species' sourced stats. These are figures only — the verdict above states whether they should share a tank.

Key facts side by side — Freshwater Angelfish vs Discus (sourced stats only)
Key factFreshwater AngelfishDiscus
Adult size15 cm20 cm
Minimum tank29 US gal55 US gal
Minimum group15+ (shoal)
TemperamentSemi-aggressivePeaceful
Temperature range24–30°C28–30°C
pH range6–7.56–7.5
BioloadMediumHigh
Swim levelMidwaterMidwater
Beginner-friendlyYesNo — advanced

Why, at a glance

Drawn straight from the sourced figures above, using the same thresholds the engine applies — these show the data behind the verdict, not a separate opinion.

Temperature range overlap — Freshwater Angelfish vs Discus Shared temperature window: 28–30°C (2°C overlap). Both ranges include it. Freshwater Angelfish: 24–30°C Discus: 28–30°C shared 14°C32°C
Temperature range overlap. Shared temperature window: 28–30°C (2°C overlap). Both ranges include it.
pH range overlap — Freshwater Angelfish vs Discus Shared pH range: 6–7.5. Both prefer water within it. Freshwater Angelfish: 6–7.5 Discus: 6–7.5 shared 5.58.5
pH range overlap. Shared pH range: 6–7.5. Both prefer water within it.
Adult size to scale — Freshwater Angelfish vs Discus Discus (20 cm) is 1.3× the length of Freshwater Angelfish (15 cm) — under the 3.5× size gap that flags predation risk. Freshwater Angelfish: 15 cm Discus: 20 cm 52.5 cm = 3.5× line 0 cm
Adult size to scale. Discus (20 cm) is 1.3× the length of Freshwater Angelfish (15 cm) — under the 3.5× size gap that flags predation risk.
Sources & confidence (2 species)

These back the Freshwater Angelfish and Discus figures used for this verdict. Each figure is read from the TankStocking species database (v2026.06); below is the care reference behind it and how confident we are in that data. Confidence reflects the source quality, not whether any pairing is safe. Full source list and the welfare model are on the methodology page.

  • Freshwater Angelfish Pterophyllum scalare — Seriously Fish (seriouslyfish.com/species/pterophyllum-scalare) high confidence
  • Discus Symphysodon aequifasciatus — Aquarium Co-Op (aquariumcoop.com/blogs/aquarium/discus-care-guide); FishLore high confidence

Why

No welfare check fires for this pairing: their adult sizes, temperaments, temperature ranges and social needs line up. Keep each in its proper group and give the tank time to mature.

A workable setup: at least 55 US gallons (208 L), with Freshwater Angelfish and a group of 5+ Discus, in a cycled, planted tank. Test your exact plan below.

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      Other species the engine clears with Freshwater Angelfish — tap to load the pairing.

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      Common questions

      Can Freshwater Angelfish live with Discus?

      Yes — Freshwater Angelfish and Discus are a workable pairing in a suitable, cycled tank. TankStocking's engine reaches this by checking minimum tank size, group needs, temperature overlap, aggression, predation by size and fin-nipping for this exact pairing.

      What tank size do Freshwater Angelfish and Discus need together?

      Plan for at least 55 US gallons so both species clear their minimum-tank needs, with Freshwater Angelfish and a group of 5+ Discus. More water and a planted layout with broken sightlines always help.

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      This is a planning estimate based on sourced species data — individual fish vary. See the methodology, the Freshwater Angelfish tank mates guide, or the full fish list.