I've got my only betta in a 5 (UK) gal tank all by himself and he certainly covers the tank. He loves going wandering and poking into hidey holes and generally enjoying the space to swim about and explore.
I know that most folks keep them in smaller tanks, but I love seeing mine swimming languidly from one area to another - you get such a good view of him.
I know that most folks keep them in smaller tanks, but I love seeing mine swimming languidly from one area to another - you get such a good view of him.

OMG I was just putting my betta in the bowl and my mom comes in and said no no no, im not having this smell.
I have no idea what to do now. I guess Ill have to hid him of something. 

My betta bowls dont smell. the main tanks have sort of a scent to them .. like good garden earth... but not the bowl. Do frequent partial water changes and there will be no smell.
Maybe daily 50-75% daily and hope for the best.