You can keep a beta in about a 1 gallon bowl if you use about a 1 inch thick substrate, provide some cover and don't over feed. Change half the water once a wee

You can keep a beta in about a 1 gallon bowl if you use about a 1 inch thick substrate, provide some cover and don't over feed. Change half the water once a week and vacuum the substrate once a month. Placing it in a high traffic area or too close to a sound producing appliance like a stereo speaker or tv can induce unwanted stress.