Instead, A good aquarium kit, such as the Pondon 5-gallon Tank for Bettas ... or live with non-betta fish in an aquarium of at least 10 gallons, per PetMD. Non-territorial tankmates are best ...

This 20-gallon betta fish tank with filter also includes ... maintaining healthy pH levels for your betta fish. They accommodate aquariums with 10, 20, 30, 45 and 60 gallons of water, depending ...