I really caution you to not feed him as much as you just did. You will end up with a bigger issue than what you are currently dealing with if you continue to overfeed. Bettas are bad to get bloated and be overfed cause they are piggies. When deciding to feed, always remember that their belly is only as big as their eyeball so they really do not need a ton of food. I am glad that he is perking up for you.