Flagtail Corydoras tank mates
Corydoras robineae
6 rated pairings from the Flagtail Corydoras care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Flagtail Corydoras needs at least 15 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Similar size, peaceful temperament, and preference for soft acidic water make them ideal companions
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Small, peaceful mid-water dweller that thrives in the same soft, acidic blackwater conditions
Cardinal Tetra
Paracheirodon axelrodi
15 gal min · 2" adult · Peaceful
Peaceful schooling fish that prefers soft acidic water and won't compete for bottom space
Good matches
3 · Compatible with normal care — watch space and numbers.Bolivian Ram
Mikrogeophagus altispinosus
20 gal min · 3.5" adult · Peaceful
Peaceful dwarf cichlid that tolerates soft water; may occasionally investigate corydoras but generally compatible
Red Cherry Shrimp
Neocaridina davidi
5 gal min · 1.2" adult · Peaceful
Peaceful invertebrate that shares the same soft water preference; corydoras may occasionally eat shrimplets
Bristlenose Pleco
Ancistrus sp.
20 gal min · 5" adult · Peaceful
Nocturnal bottom-dweller that avoids direct competition; both are peaceful and benefit from similar water conditions
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.