Why doesn't my beta fish eat or swim much?

My beta that I got about a week ago is just sitting at the bottom of the tank and dont swim around much at all. What can I do to let him have fun and swim around more? Another thing is that he is not eating much. I feed him blood worms. What should I do?
Thanks,
Heath

make sure you have plants and some kind of ornament or shelter... and feed him beta flakes or pellets in addition to the blood worms. [[I work at a pet store lol]]

Bettas are not very active fish. If you expect them to swim as much as other tropical fish you will be disappointed. They also don't eat a lot, you shouldn't feed them more than they can eat in 2 minutes then you should scoop up any uneaten food. Make sure your aquarium is warm enough; bettas are tropical fish so you may need a heater to keep them comfy. Blood worms are good for bettas.

if you haven't changed the water in a while, try chaning the water but make sure it is at the right temperature. Beta's like having stuff like plants in the tank with them. If you put a mirror up to the tank most likely it will see it's reflection and be a little more active and try to defend it's territory. don't keep the mirror up all day.. just every once and a whiel

your betta might have backteria on it and you can tell if it has some white stuff on it or any ripped fins