Green Swordtail tank mates
Xiphophorus hellerii
5 rated pairings from the Green Swordtail care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Green Swordtail needs at least 20 gallons on its own; every companion adds to that.
Excellent matches
2 · Same water, complementary zones, no conflict.
Platy
Xiphophorus maculatus
10 gal min · 2.5" adult · Peaceful
Closely related livebearers with identical care needs and compatible social behavior
Bristlenose Pleco
Ancistrus sp.
20 gal min · 5" adult · Peaceful
Peaceful algae eater that stays small and occupies bottom zone without competing for resources
Good matches
3 · Compatible with normal care — watch space and numbers.
Guppy
Poecilia reticulata
10 gal min · 2" adult · Peaceful
Similar peaceful temperament and water requirements; males may compete for territory but generally coexist well
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small schooling fish that occupy mid-water and pose no threat; swordtails ignore them
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Peaceful invertebrate that helps control algae and does not compete with fish for food
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.