A beginner-friendly fish guide

Swordtail

Swordtail

Xiphophorus hellerii

Moderate temperament; social. Check the planner before choosing tank mates.

Beginner level 3/5

A good environment

Recommended temperature
22 ~ 26°C
Recommended pH
7.2 ~ 7.9
Preferred water hardness
Medium hardness
Minimum aquarium
108L or more

Reference sources list a wider range of 16~28°C and pH 7.0~8.0. The planner uses the narrower range above as a safer starting point for beginners.

At a glance

Group
Livebearers
Average adult size
about 14 cm (medium)
Minimum tank length
about 120 cm
Activity level
High
Waste level
Moderate
Lid recommended
Yes
Mature tank preferred
Not required

Temperament & group size

Moderate temperament; Social.

For a comfortable group, keep at least 3.

Usually swims in the upper & middle.

Tank-mate notes

Adult shrimp may be attacked; take care with shrimp tank mates.

Baby shrimp may be eaten. A separate breeding tank is safer.

Check each combination carefully, especially when size or temperament differs.

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Frequently asked questions

How big does Swordtail get, and what tank size does it need?

Adults average about 14 cm, a medium species. The planner recommends an aquarium of at least 108 L and about 120 cm long.

What water temperature and pH does Swordtail need?

The planner range is 22~26°C and pH 7.2~7.9, with medium hardness. Reference sources list a wider range of 16~28°C and pH 7.0~8.0. The planner uses the narrower range above as a safer starting point for beginners.

How many Swordtail should be kept together?

Social: keep at least 3. Temperament is moderate.

Can Swordtail live with shrimp?

Adult shrimp: not recommended. Baby shrimp: not recommended.

Is Swordtail a good fish for beginners?

Beginner level 3/5. A lid is recommended. Activity: high; waste: moderate.