A betta needs a cycled, heated tank of at least 5 gallons at 76–82°F, a gentle filter, a 20–30% water change every week, and a small amount of betta pellets once or twice a day. Keep one male per tank.
The basics at a glance
5 gal+Tank, with a lid: bettas jump
76–82°FWith an adjustable heater
GentleSponge filter or low flow
Weekly20–30% water change
Signs of a happy betta
Bright colour, fins spread, building bubble nests, eager at feeding time. Clamped fins, pale colour or hiding all day usually mean the water needs testing.
Good and bad tankmates
Often fineEmber tetras, pygmy corys, nerite snails (10 gal+)
AvoidTiger barbs, guppies, other bettas, gouramis
Questions
Can a betta live in a bowl?
A small unheated bowl leads to cold water and ammonia build-up. A 5 gallon heated, filtered tank is the minimum for a healthy betta.
Can bettas live with other fish?
Sometimes, in 10 gallons or more, with calm small fish like ember tetras or pygmy corys. Avoid fin nippers and other long-finned fish, and never two males.
How often should I feed my betta?
Two or three pellets once or twice a day, about what it eats in a minute or two. Skip a day each week.
General information, not veterinary advice. Updated November 2026.