Japanese Trapdoor Snail tank mates
Cipangopaludina japonica
5 rated pairings from the Japanese Trapdoor Snail care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Japanese Trapdoor Snail needs at least 10 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
Peaceful algae-eaters with identical water requirements and non-aggressive behavior
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small, peaceful schooling fish that occupy mid-water column and ignore snails
Harlequin Rasbora
Trigonostigma heteromorpha
10 gal min · 2" adult · Peaceful
Peaceful schooling fish with compatible water requirements and non-predatory behavior
Good matches
2 · Compatible with normal care — watch space and numbers.
Amano Shrimp
Caridina multidentata
10 gal min · 2" adult · Peaceful
Peaceful invertebrates with similar water parameters; may compete for algae but coexist well
Dwarf Gourami
Trichogaster lalius
15 gal min · 3.5" adult · Semi-aggressive
Peaceful, slow-moving fish that won't harass snails in planted or spacious tanks
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.