i keep my boys each in their own 10 gal. with 5 or 6 females with them. so far this has been my best experience with bettas. i did the bowl thing because the dude at petco said they are happier in small amounts of water with little or no movement. mine was so active and i felt bad for him. so i put him in a 5 hex with just the filter with some neons and that worked well to. i also had a betta in a 55 with several tetra schools, but i he got way stressed and i dont think i would recomend them in too big of a tank. they are definately the most interesting when they have a good number of females to interact with.