Orange Swordtail tank mates
Xiphophorus hellerii
6 rated pairings from the Orange Swordtail care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Orange Swordtail needs at least 20 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 that stay on substrate and do not compete for food or space
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Harmless detritivores that help maintain tank cleanliness without competing with swordtails
Java Moss
Taxiphyllum barbieri
Provides essential cover for fry and helps reduce aggression through visual barriers
Good matches
2 · Compatible with normal care — watch space and numbers.
Emerald Dwarf Rasbora
Danio erythromicron
10 gal min · 1" adult · Peaceful
Peaceful schooling fish that occupy different water zones and have compatible temperature requirements
Bristlenose Pleco
Ancistrus sp.
20 gal min · 5" adult · Peaceful
Nocturnal algae eater that occupies different niche; ensure adequate hiding spots
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.