South American Puffer tank mates
Colomesus asellus
5 rated pairings from the South American Puffer care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. South American Puffer needs at least 30 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.Diamond Tetra
Moenkhausia pittieri
15 gal min · 2.5" adult · Peaceful
Fast-moving, robust tetras that can coexist with puffers; similar water parameters and peaceful community preference
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Small, active rasboras that stay in groups and move quickly enough to avoid puffer aggression
Rummy Nose Tetra
Hemigrammus rhodostomus
15 gal min · 2" adult · Peaceful
Schooling fish with fast movement patterns that reduce predation risk in community settings
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.