Can glass catfish live with swordtails?

Verdict
Yes

Yes. Glass catfish and swordtails get along in the same tank. Both are fine at 75–79°F. Plan on at least 30 gal.

Glass catfishGlass catfish75–80°F · pH 6.5–7.5 SwordtailSwordtail72–79°F · pH 7–8.3

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Glass catfish 75–80°Swordtail 72–79°
The green band is the temperature range both can live in.
456789Both: 7–7.5Glass catfish 6.5–7.5Swordtail 7–8.3
The green band is the pH both tolerate.

Size to scale

Glass catfish · 3 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

Glass catfishSwordtail
Temperature75–80 °F72–79 °F
pH6.5–7.57–8.3
Adult size3.0 in5.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Groups of 3+
DietCarnivoreOmnivore

Better tank mates for glass catfish

All glass catfish tank mates

Better tank mates for swordtails

All swordtail tank mates

Questions

Can glass catfish live with swordtails?

Yes. Glass catfish and swordtails get along in the same tank. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both glass catfish and swordtails?

75–79 °F. Glass catfish need 75–80 °F, swordtails need 72–79 °F.

What size tank do glass catfish and swordtails need together?

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