Angelfish vs Discus
Two tall, graceful Amazonian cichlids and classic centrepieces. The angelfish is a manageable step-up fish; the discus is the demanding king of the aquarium. Here's which one your tank and experience can support.
The quick verdict
These share a shape but not a skill level. Choose the angelfish if you want a striking tall cichlid that tolerates normal community conditions in a tall 150-litre tank. Choose the discus only if you're an experienced keeper ready to commit to a big tank, very warm soft water and a strict water-change routine. For most people, the angelfish is the sensible choice.
| Angelfish | Discus | |
|---|---|---|
| Care level | Intermediate | Advanced |
| Min tank size | 150 L / 40 gal (tall) | 250 L / 60 gal (group) |
| Temperament | Semi-aggressive; eats small fish | Peaceful but shy |
| Adult size | 15 cm long, up to 20 cm tall | 15–20 cm |
| Water | pH 6.0–7.5, 24–28 °C | pH 6.0–7.0, 28–30 °C, pristine |
| Best for | Tall community centrepiece | Experienced keepers, species tanks |
The real differences
Both need height, but discus need much more of everything else. Angelfish accept 24–28 °C and a range of hardness, and slot into a peaceful community of fish too big to eat and too calm to nip their fins. Discus demand 28–30 °C, soft acidic water and near-spotless conditions with frequent, generous water changes — the high heat alone rules out many tankmates and raises their oxygen and water-quality demands. Angelfish are semi-aggressive (and will eat small fish); discus are peaceful but shy and best in a group of five or more.
Which should you buy?
Our pick
The angelfish is the right centrepiece for the vast majority of keepers with a tall tank. Reserve the discus for when you have the space, the warm soft water and the discipline for its exacting upkeep. Read the angelfish care guide and discus care guide, and plan the tank with our best large aquarium picks.
Frequently asked questions
Are angelfish easier than discus?
Much easier. Angelfish are intermediate and tolerate normal community temperatures and a range of water. Discus are advanced — they demand a large tank, very warm water (28–30 °C), soft slightly acidic conditions and pristine water quality with frequent water changes. Discus punish neglect; angelfish are far more forgiving.
Can angelfish and discus live together?
It is possible but not ideal. Both are tall Amazonian cichlids, but discus need warmer water (28–30 °C) than angelfish prefer, and angelfish can outcompete the slower, shyer discus at feeding time and may harass them. Many keepers keep discus in a species tank for exactly this reason.
How big do angelfish and discus get?
Both are large, tall cichlids. Angelfish reach about 15 cm long and up to 20 cm tall including the fins, needing a tall tank. Discus grow to 15–20 cm and are round and deep-bodied, needing at least 250 litres for a proper group.
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