Threadfin Acara tank mates
Acarichthys heckelii
5 rated pairings from the Threadfin Acara care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Threadfin Acara needs at least 55 gallons on its own; every companion adds to that.
Excellent matches
1 · Same water, complementary zones, no conflict.
Good matches
3 · Compatible with normal care — watch space and numbers.
Cardinal Tetra
Paracheirodon axelrodi
15 gal min · 2" adult · Peaceful
Small, peaceful schooling fish that occupy mid-water and won't compete for bottom space
Rummy Nose Tetra
Hemigrammus rhodostomus
15 gal min · 2" adult · Peaceful
Peaceful schoolers from similar South American habitats with compatible water parameter requirements
Bolivian Ram
Mikrogeophagus altispinosus
20 gal min · 3.5" adult · Peaceful
Peaceful dwarf cichlid with similar temperature and pH needs; may occasionally compete for bottom space but generally compatible
Use caution
1 · 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.