What’s the best size tank for a betta fish?
What’s the best size tank for a betta fish? Bettas need an aquarium with at least 3 gallons (11 liters), a filter and a heater. Set up their new home at least one day before they arrive. The aquarium should be near a power source, in a low-traffic area, away from direct sunlight and drafts. Water weighs about 8 pounds per gallon.