Betta

A single betta needs at least 5 gallons. A 10-gallon tank is better because it provides more stable water parameters and more swimming space. Anything under 5 gallons requires more frequent water changes and offers less room for plants and enrichment.

Male bettas should be kept alone. Some peaceful tank mates like nerite snails or African dwarf frogs can work in tanks 10 gallons and up. Female bettas can form sororities in 20+ gallon heavily planted tanks, but this requires experience and close monitoring.

Yes. Bettas are tropical fish that need water between 76-82F. A filter maintains water quality by hosting beneficial bacteria. Choose a filter with adjustable flow because bettas prefer calm water and can be stressed by strong currents.