Betta

Betta splendens

Also known as: Siamese fighting fish

Quick Facts

• Adult size: 6-7 cm (2.36 to 2.76 inches)
• Minimum tank size: 40 litres (10.56 gallons)
• Lifespan: 3–5 years
• Temperament: semi-aggressive
• Swimming level: top-and-middle
• Diet: carnivore
• Minimum group size: 1
• Difficulty: beginner

Water Parameters

• Temperature: 22–30°C
• pH: 6–8
• Hardness: 18–268 dGH

Care Summary

A hardy labyrinth fish that breathes atmospheric air directly from the surface. Thrives in warm, gently filtered water and prefers minimal current. Solitary by nature; best kept alone or with carefully chosen peaceful tankmates.

Tankmates

Males cannot be housed together. Avoid colourful or long-finned tankmates as they may trigger aggression.

Compatible with

• Corydoras
• Kuhli Loach
• Nerite Snail

Avoid keeping with

• Guppy
• Other Male Bettas
• Fin Nippers

Common Problems

• fin rot
• ich
• swim bladder issues from overfeeding

Sources: seriouslyfish.com, fishbase.org · Last updated: 2026-06-01