Marble Betta tank mates
Betta splendens 'Marble'
4 rated pairings from the Marble Betta care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Marble Betta needs at least 5 gallons on its own; every companion adds to that.
Good matches
2 · Compatible with normal care — watch space and numbers.
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful algae eater that stays on substrate and avoids betta territory; requires similar warm water
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Non-aggressive, helps with algae and detritus; some bettas may nip fins but generally tolerated
Use caution
2 · Works in the right setup; read the note before combining.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small schooling fish that may trigger predatory response; only in larger tanks with plenty of plants for escape routes
Ember Tetra
Hyphessobrycon amandae
10 gal min · 0.8" adult · Peaceful
Tiny, fast-moving tetras that may stress betta or trigger chasing; requires dense vegetation and 10+ gallon minimum
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.