When I first got my Betta I kept him in a 1/4 gallon bowl. He seemed to be doing very well. Of course I was doing daily water changes too. But within 2 weeks I felt sorry for him to live in something so confined and purchased a 10 g tank. He is like a totatlly different fish. Really getting quite a personality. Take the plunge and upgrade, you won't be sorry. He resides with some tankmates (neon tetras&white clouds) and gets along fine. BTW in his bowl as well as the tank he resuses to eat anything except freeze dried bloodworms and peas.