I can't afford that stuff at the moment and everything seems fine so far he just gets stressed when I take him out of the tank to clean it. I spent $10 on the fish, food and conditioner. And my parents are the kind of parents who make me pay for the materialistic things i want my self. It's understandable.
My parents don't make me pay for my things, but I want to. They already provide so much for me. I got a job, and have spent loads of money on my bettas. If you aren't prepared to buy all the essentials for a betta, please look into getting a job, or giving the betta away to someone more properly suited.
I don't want to sound repetitive, but you can't just feed live earthworms to your betta everyday, if at al;. Everyone has listed various reasons and good points, so please take those into consideration.
I don't wish to offend or hurt you, so please try to understand.
If not, be persistent!
He will eventually eat the pellet/flake foods rather than starve to death.
Try to wean him off the earthworm diet, if you can't just abruptly stop. Feed him earthworms 1 day, then pellets/flakes the next day. Slowly, cancel out the earthworms and stick with the pellets/flakes.
I know it's hard since they beg for food, but you gotta show him some tough love! You're only doing what's best for him in the end.
Once again, agreeing with Mar. Eventually, a betta will settle for other types of food. I understand that many people don't expect bettas to be a lot of work when they initially purchase one, but you have to be willing to do what needs to be done for your pet. So I would suggest asking your parents to "front" you the money until you can pay them back or scrounge up whatever you can and purchase a cheap heater until you can get something better.
It's ok I understand, I've had him for about a month now. I always check for any signs of sickness and none have appeared. Domestic betta fish have wild ancestors and since earth worms live where dirt is plenty they probably ate them. Its like cheese burgers, sure it's unheathy to eat them all the time but if there was no food left except for cheese burgers and brown pellets with a bunch of gluten meal and who knows what else in it. What would you choose to live on? A tasty warm burger, or a cold tasteless brown protein rock, You could say its food for thought. :3