Similis Corydoras tank mates
Corydoras similis
6 rated pairings from the Similis Corydoras care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Similis Corydoras needs at least 15 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Similar water parameters and peaceful temperament; occupy mid-water column
Rummy Nose Tetra
Hemigrammus rhodostomus
15 gal min · 2" adult · Peaceful
Peaceful schooling fish with identical temperature and pH requirements
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful bottom-dweller; similar size and water needs; non-competitive
Good matches
3 · Compatible with normal care — watch space and numbers.
Red Cherry Shrimp
Neocaridina davidi
5 gal min · 1.2" adult · Peaceful
Peaceful invertebrate; may occasionally be nipped but generally compatible
Dwarf Gourami
Trichogaster lalius
15 gal min · 3.5" adult · Semi-aggressive
Peaceful mid-water dweller with overlapping temperature range
Bolivian Ram
Mikrogeophagus altispinosus
20 gal min · 3.5" adult · Peaceful
Peaceful bottom-dweller; may compete for food but generally compatible
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.