Can rummy nose tetras live with swordtails?

Verdict
Yes, with care

Yes, with care. Rummy nose tetras and swordtails can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.

Rummy nose tetraRummy nose tetra75–84°F · pH 5.5–7 SwordtailSwordtail72–79°F · pH 7–8.3

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Rummy nose tetra 75–84°Swordtail 72–79°
The green band is the temperature range both can live in.
456789Both: 7Rummy nose tetra 5.5–7Swordtail 7–8.3
The green band is the pH both tolerate.

Size to scale

Rummy nose tetra · 2 inSwordtail · 5 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

Rummy nose tetraSwordtail
Temperature75–84 °F72–79 °F
pH5.5–77–8.3
Adult size2.0 in5.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Groups of 3+
DietOmnivoreOmnivore

Better tank mates for rummy nose tetras

All rummy nose tetra tank mates

Better tank mates for swordtails

All swordtail tank mates

Questions

Can rummy nose tetras live with swordtails?

Yes, with care. Rummy nose tetras and swordtails can share a tank, but watch one thing. Water chemistry is a squeeze. The only pH that suits both is around 7.

What temperature suits both rummy nose tetras and swordtails?

75–79 °F. Rummy nose tetras need 75–84 °F, swordtails need 72–79 °F.

What size tank do rummy nose tetras and swordtails need together?

At least 30 gal, set by the swordtail. Add space for each extra fish.