Koi Angelfish tank mates
Pterophyllum scalare
5 rated pairings from the Koi Angelfish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Koi Angelfish needs at least 30 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.
Good matches
2 · Compatible with normal care — watch space and numbers.
Cardinal Tetra
Paracheirodon axelrodi
15 gal min · 2" adult · Peaceful
Similar water parameters and mid-water swimming; larger than Neons, reducing predation risk
Rummy Nose Tetra
Hemigrammus rhodostomus
15 gal min · 2" adult · Peaceful
Schooling fish with compatible water requirements; keep in groups of 6+
Use caution
2 · Works in the right setup; read the note before combining.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.