Betas don't need filtration as they breathe air. One of the decorative bowls from the floral department at WalMart with the scallopped rim is a fine size, they don't get much bigger than that, but any size container is fine. Purchase aquarium rocks, or decorative pebbles from the floral or craft department is fine, and a small plastic aquarium plant is fine. Filtered water is fine, or purchase dechlorinator. Beta food is fed, 3 pellets once a day. Change water once a week. And ONLY ONE Beta per container, they are fighting fish.
My Mom and I have had over 100 at one point. They come in an array of species, and beautiful colours.
