Rainbow Emperor Tetra tank mates
Nematobrycon lacortei
5 rated pairings from the Rainbow Emperor Tetra care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Rainbow Emperor Tetra needs at least 15 gallons on its own; every companion adds to that.
Excellent matches
2 · Same water, complementary zones, no conflict.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Similar size, water parameters, and peaceful temperament; excellent community fish
Cardinal Tetra
Paracheirodon axelrodi
15 gal min · 2" adult · Peaceful
Comparable size and requirements; both prefer soft, acidic water and mid-water swimming zones
Good matches
2 · Compatible with normal care — watch space and numbers.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful bottom-dweller that won't compete for food or space; helps maintain tank cleanliness
Red Cherry Shrimp
Neocaridina davidi
5 gal min · 1.2" adult · Peaceful
Small shrimp are generally safe with tetras; provide algae control and occupy different water zones
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.