Tanks: the bigger the better. and if you have a 10gallon, or 5 gallon a few neon tetras are fine with them. please run away from bowls. Food: not sure about food brands, but betta specific food. i've also been told that the occasional blood worm is good. I know somone with bettas who normally live for 4 or 5 years. i really wanted a betta, they are soooo pretty.