Hi-Fin Swordtail tank mates
Xiphophorus hellerii
5 rated pairings from the Hi-Fin Swordtail care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Hi-Fin Swordtail needs at least 20 gallons on its own; every companion adds to that.
Excellent matches
3 · Same water, complementary zones, no conflict.
Guppy
Poecilia reticulata
10 gal min · 2" adult · Peaceful
Similar size, peaceful temperament, and compatible water parameters make them ideal companions
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Peaceful algae eater that stays small and won't harass the Hi-Fin Swordtail's extended fins
Gold Mystery Snail
Pomacea bridgesii
5 gal min · 2" adult · Peaceful
Non-aggressive invertebrate that helps with algae control and won't disturb the swordtail
Good matches
2 · Compatible with normal care — watch space and numbers.
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small, non-aggressive schooling fish that won't compete for space or resources
Rummy Nose Tetra
Hemigrammus rhodostomus
15 gal min · 2" adult · Peaceful
Schooling fish with peaceful nature; avoid fin-nippers that might damage the extended dorsal fin
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.