Least Rasbora tank mates
Boraras urophthalmoides
5 rated pairings from the Least Rasbora care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Least Rasbora needs at least 5 gallons on its own; every companion adds to that.
Excellent matches
2 · Same water, complementary zones, no conflict.Chili Rasbora
Boraras brigittae
5 gal min · 0.8" adult · Peaceful
Boraras brigittae is similarly sized and shares identical water parameter requirements, making it a perfect nano tankmate.
Pygmy Corydoras
Corydoras pygmaeus
10 gal min · 1" adult · Peaceful
Corydoras pygmaeus occupies the bottom zone, poses no threat, and thrives in the same soft, acidic water conditions.
Good matches
3 · Compatible with normal care — watch space and numbers.
Sparkling Gourami
Trichopsis pumila
10 gal min · 1.5" adult · Peaceful
Trichopsis pumila is small and peaceful but monitor to ensure it does not outcompete the rasboras for food.
Neon Green Rasbora
Microdevario kubotai
10 gal min · 1.5" adult · Peaceful
Microdevario kubotai shares similar soft-water needs and peaceful temperament, though it is slightly larger.
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Microdevario erythromicron prefers slightly harder water so parameters should be carefully balanced when kept together.
Also recommended alongside Least Rasbora
Species whose own guides list Least Rasbora as a tank mate.
Banded Panchax
Epiplatys fasciolatus
10 gal min · 1.5" adult · Peaceful
Betta Hendra
Betta hendra
10 gal min · 2.5" adult · Semi-aggressive
Dageti Killifish
Epiplatys dageti
10 gal min · 1.2" adult · Peaceful
Guenther's Notho
Nothobranchius guentheri
10 gal min · 1.6" adult · Peaceful
Mini Fissidens
Fissidens splachnobryoides
Poso Orange Shrimp
Caridina glaubrechti
10 gal min · 1.2" adult · Peaceful
Red-Striped Killifish
Aphyosemion striatum
10 gal min · 1.5" adult · Peaceful
Two-Striped Lampeye
Chromaphyosemion bitaeniatum
10 gal min · 1.2" adult · Peaceful
Twostripe Aphyosemion
Aphyosemion bivittatum
10 gal min · 1.5" adult · Semi-aggressive
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.