Japan Blue Endler tank mates
Poecilia wingei
6 rated pairings from the Japan Blue Endler care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Japan Blue Endler needs at least 5 gallons on its own; every companion adds to that.
Excellent matches
4 · Same water, complementary zones, no conflict.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful algae eaters that occupy bottom zone and won't compete with or harm Endlers

Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Harmless detritivores that help maintain water quality in nano tanks
Orchid Endler
Poecilia wingei
5 gal min · 1.2" adult · Peaceful
Closely related Endler variety with identical care requirements and peaceful temperament
Blue Star Endler
Poecilia wingei
5 gal min · 1.2" adult · Peaceful
Compatible Endler strain with same size, behavior, and water needs
Good matches
2 · Compatible with normal care — watch space and numbers.
Red Cherry Shrimp
Neocaridina davidi
5 gal min · 1.2" adult · Peaceful
Peaceful invertebrates with similar water parameters; fry may be at risk but adults coexist well

Ember Tetra
Hyphessobrycon amandae
10 gal min · 0.8" adult · Peaceful
Small, peaceful tetra with similar temperature preferences and non-aggressive behavior
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.